diff --git a/java/com/google/gerrit/server/account/AccountResolver.java b/java/com/google/gerrit/server/account/AccountResolver.java
deleted file mode 100644
index 9b25a6e..0000000
--- a/java/com/google/gerrit/server/account/AccountResolver.java
+++ /dev/null
@@ -1,261 +0,0 @@
-// Copyright (C) 2009 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package com.google.gerrit.server.account;
-
-import static com.google.common.collect.ImmutableSet.toImmutableSet;
-import static java.util.stream.Collectors.toSet;
-
-import com.google.common.collect.ImmutableSet;
-import com.google.common.collect.Streams;
-import com.google.gerrit.common.Nullable;
-import com.google.gerrit.extensions.restapi.AuthException;
-import com.google.gerrit.extensions.restapi.UnprocessableEntityException;
-import com.google.gerrit.reviewdb.client.Account;
-import com.google.gerrit.server.AnonymousUser;
-import com.google.gerrit.server.CurrentUser;
-import com.google.gerrit.server.IdentifiedUser;
-import com.google.gerrit.server.account.externalids.ExternalId;
-import com.google.gerrit.server.query.account.InternalAccountQuery;
-import com.google.gwtorm.server.OrmException;
-import com.google.inject.Inject;
-import com.google.inject.Provider;
-import com.google.inject.Singleton;
-import java.io.IOException;
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Optional;
-import java.util.Set;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-import org.eclipse.jgit.errors.ConfigInvalidException;
-
-@Singleton
-public class AccountResolver {
-  private final Provider<CurrentUser> self;
-  private final Realm realm;
-  private final Accounts accounts;
-  private final AccountCache byId;
-  private final IdentifiedUser.GenericFactory userFactory;
-  private final AccountControl.Factory accountControlFactory;
-  private final Provider<InternalAccountQuery> accountQueryProvider;
-  private final Emails emails;
-
-  @Inject
-  AccountResolver(
-      Provider<CurrentUser> self,
-      Realm realm,
-      Accounts accounts,
-      AccountCache byId,
-      IdentifiedUser.GenericFactory userFactory,
-      AccountControl.Factory accountControlFactory,
-      Provider<InternalAccountQuery> accountQueryProvider,
-      Emails emails) {
-    this.self = self;
-    this.realm = realm;
-    this.accounts = accounts;
-    this.byId = byId;
-    this.userFactory = userFactory;
-    this.accountControlFactory = accountControlFactory;
-    this.accountQueryProvider = accountQueryProvider;
-    this.emails = emails;
-  }
-
-  /**
-   * Locate exactly one account matching the input string.
-   *
-   * @param input a string of the format "Full Name &lt;email@example&gt;", just the email address
-   *     ("email@example"), a full name ("Full Name"), an account ID ("18419") or a user name
-   *     ("username").
-   * @return the single account that matches; null if no account matches or there are multiple
-   *     candidates. If {@code input} is a numeric string, returns an account if and only if that
-   *     number corresponds to an actual account ID.
-   */
-  public Account find(String input) throws OrmException, IOException, ConfigInvalidException {
-    Set<Account.Id> r = findAll(input);
-    if (r.size() == 1) {
-      return byId.get(r.iterator().next()).map(AccountState::getAccount).orElse(null);
-    }
-
-    Account match = null;
-    for (Account.Id id : r) {
-      Optional<Account> account = byId.get(id).map(AccountState::getAccount);
-      if (!account.map(Account::isActive).orElse(false)) {
-        continue;
-      }
-      if (match != null) {
-        return null;
-      }
-      match = account.get();
-    }
-    return match;
-  }
-
-  private Set<Account.Id> findAll(String input)
-      throws OrmException, IOException, ConfigInvalidException {
-    Matcher m = Pattern.compile("^.* \\(([1-9][0-9]*)\\)$").matcher(input);
-    if (m.matches()) {
-      Optional<Account.Id> id = Account.Id.tryParse(m.group(1));
-      if (id.isPresent()) {
-        // Short circuit if the format matched.
-        return Streams.stream(accounts.get(id.get()))
-            .map(a -> a.getAccount().getId())
-            .collect(toImmutableSet());
-      }
-    }
-
-    if (input.matches("^[1-9][0-9]*$")) {
-      Optional<Account.Id> id = Account.Id.tryParse(input);
-      if (id.isPresent()) {
-        // Short circuit if the format matched.
-        return Streams.stream(accounts.get(id.get()))
-            .map(a -> a.getAccount().getId())
-            .collect(toImmutableSet());
-      }
-    }
-
-    if (ExternalId.isValidUsername(input)) {
-      Optional<AccountState> who = byId.getByUsername(input);
-      if (who.isPresent()) {
-        return ImmutableSet.of(who.map(a -> a.getAccount().getId()).get());
-      }
-      // Don't short-circuit just because the format matches.
-    }
-
-    return findAllByNameOrEmail(input);
-  }
-
-  private Set<Account.Id> findAllByNameOrEmail(String nameOrEmail)
-      throws OrmException, IOException {
-    int lt = nameOrEmail.indexOf('<');
-    int gt = nameOrEmail.indexOf('>');
-    if (lt >= 0 && gt > lt && nameOrEmail.contains("@")) {
-      Set<Account.Id> ids = emails.getAccountFor(nameOrEmail.substring(lt + 1, gt));
-      if (ids.isEmpty() || ids.size() == 1) {
-        return ids;
-      }
-
-      // more than one match, try to return the best one
-      String name = nameOrEmail.substring(0, lt - 1);
-      Set<Account.Id> nameMatches = new HashSet<>();
-      for (Account.Id id : ids) {
-        Optional<Account> a = byId.get(id).map(AccountState::getAccount);
-        if (a.isPresent() && name.equals(a.get().getFullName())) {
-          nameMatches.add(id);
-        }
-      }
-      // Short circuit if the format matched.
-      return nameMatches.isEmpty() ? ids : nameMatches;
-    }
-
-    if (nameOrEmail.contains("@")) {
-      // Short circuit if the format matched.
-      return emails.getAccountFor(nameOrEmail);
-    }
-
-    Account.Id id = realm.lookup(nameOrEmail);
-    // Short circuit only if it returned a result.
-    if (id != null) {
-      return Collections.singleton(id);
-    }
-
-    List<AccountState> m = accountQueryProvider.get().byFullName(nameOrEmail);
-    // Short circuit only if it returned exactly one result.
-    if (m.size() == 1) {
-      return Collections.singleton(m.get(0).getAccount().getId());
-    }
-
-    // At this point we have no clue. Just perform a whole bunch of suggestions
-    // and pray we come up with a reasonable result list.
-    // TODO(dborowitz): This doesn't match the documentation; consider whether it's possible to be
-    // more strict here.
-    return accountQueryProvider
-        .get()
-        .byDefault(nameOrEmail)
-        .stream()
-        .map(a -> a.getAccount().getId())
-        .collect(toSet());
-  }
-
-  /**
-   * Parses a account ID from a request body and returns the user.
-   *
-   * @param id ID of the account, can be a string of the format "{@code Full Name
-   *     <email@example.com>}", just the email address, a full name if it is unique, an account ID,
-   *     a user name or "{@code self}" for the calling user
-   * @return the user, never null.
-   * @throws UnprocessableEntityException thrown if the account ID cannot be resolved or if the
-   *     account is not visible to the calling user
-   */
-  public IdentifiedUser parse(String id)
-      throws AuthException, UnprocessableEntityException, OrmException, IOException,
-          ConfigInvalidException {
-    return parseOnBehalfOf(null, id);
-  }
-
-  /**
-   * Parses an account ID and returns the user without making any permission check whether the
-   * current user can see the account.
-   *
-   * @param id ID of the account, can be a string of the format "{@code Full Name
-   *     <email@example.com>}", just the email address, a full name if it is unique, an account ID,
-   *     a user name or "{@code self}" for the calling user
-   * @return the user, null if no user is found for the given account ID
-   * @throws AuthException thrown if 'self' is used as account ID and the current user is not
-   *     authenticated
-   * @throws OrmException
-   * @throws ConfigInvalidException
-   * @throws IOException
-   */
-  public IdentifiedUser parseId(String id)
-      throws AuthException, OrmException, IOException, ConfigInvalidException {
-    return parseIdOnBehalfOf(null, id);
-  }
-
-  /**
-   * Like {@link #parse(String)}, but also sets the {@link CurrentUser#getRealUser()} on the result.
-   */
-  public IdentifiedUser parseOnBehalfOf(@Nullable CurrentUser caller, String id)
-      throws AuthException, UnprocessableEntityException, OrmException, IOException,
-          ConfigInvalidException {
-    IdentifiedUser user = parseIdOnBehalfOf(caller, id);
-    if (user == null || !accountControlFactory.get().canSee(user.getAccount().getId())) {
-      throw new UnprocessableEntityException(
-          String.format("Account '%s' is not found or ambiguous", id));
-    }
-    return user;
-  }
-
-  private IdentifiedUser parseIdOnBehalfOf(@Nullable CurrentUser caller, String id)
-      throws AuthException, OrmException, IOException, ConfigInvalidException {
-    if (id.equals("self")) {
-      CurrentUser user = self.get();
-      if (user.isIdentifiedUser()) {
-        return user.asIdentifiedUser();
-      } else if (user instanceof AnonymousUser) {
-        throw new AuthException("Authentication required");
-      } else {
-        return null;
-      }
-    }
-
-    Account match = find(id);
-    if (match == null) {
-      return null;
-    }
-    CurrentUser realUser = caller != null ? caller.getRealUser() : null;
-    return userFactory.runAs(null, match.getId(), realUser);
-  }
-}