diff --git a/java/com/google/gerrit/entities/AccountGroup.java b/java/com/google/gerrit/entities/AccountGroup.java
index c10edc2..b6da194 100644
--- a/java/com/google/gerrit/entities/AccountGroup.java
+++ b/java/com/google/gerrit/entities/AccountGroup.java
@@ -15,23 +15,8 @@
 package com.google.gerrit.entities;
 
 import com.google.auto.value.AutoValue;
-import com.google.gerrit.common.Nullable;
-import java.sql.Timestamp;
-import java.time.Instant;
-import java.util.Objects;
 
-/** Named group of one or more accounts, typically used for access controls. */
 public final class AccountGroup {
-  /**
-   * Time when the audit subsystem was implemented, used as the default value for {@link #createdOn}
-   * when one couldn't be determined from the audit log.
-   */
-  private static final Instant AUDIT_CREATION_INSTANT_MS = Instant.ofEpochMilli(1244489460000L);
-
-  public static Timestamp auditCreationInstantTs() {
-    return Timestamp.from(AUDIT_CREATION_INSTANT_MS);
-  }
-
   public static NameKey nameKey(String n) {
     return new AutoValue_AccountGroup_NameKey(n);
   }
@@ -135,158 +120,4 @@
       return Integer.toString(get());
     }
   }
-
-  /** Unique name of this group within the system. */
-  protected NameKey name;
-
-  /** Unique identity, to link entities as {@link #name} can change. */
-  protected Id groupId;
-
-  // DELETED: id = 3 (ownerGroupId)
-
-  /** A textual description of the group's purpose. */
-  @Nullable protected String description;
-
-  // DELETED: id = 5 (groupType)
-  // DELETED: id = 6 (externalName)
-
-  protected boolean visibleToAll;
-
-  // DELETED: id = 8 (emailOnlyAuthors)
-
-  /** Globally unique identifier name for this group. */
-  protected UUID groupUUID;
-
-  /**
-   * Identity of the group whose members can manage this group.
-   *
-   * <p>This can be a self-reference to indicate the group's members manage itself.
-   */
-  protected UUID ownerGroupUUID;
-
-  @Nullable protected Timestamp createdOn;
-
-  protected AccountGroup() {}
-
-  public AccountGroup(
-      AccountGroup.NameKey newName,
-      AccountGroup.Id newId,
-      AccountGroup.UUID uuid,
-      Timestamp createdOn) {
-    name = newName;
-    groupId = newId;
-    visibleToAll = false;
-    groupUUID = uuid;
-    ownerGroupUUID = groupUUID;
-    this.createdOn = createdOn;
-  }
-
-  public AccountGroup(AccountGroup other) {
-    name = other.name;
-    groupId = other.groupId;
-    description = other.description;
-    visibleToAll = other.visibleToAll;
-    groupUUID = other.groupUUID;
-    ownerGroupUUID = other.ownerGroupUUID;
-    createdOn = other.createdOn;
-  }
-
-  public AccountGroup.Id getId() {
-    return groupId;
-  }
-
-  public String getName() {
-    return name.get();
-  }
-
-  public AccountGroup.NameKey getNameKey() {
-    return name;
-  }
-
-  public void setNameKey(AccountGroup.NameKey nameKey) {
-    name = nameKey;
-  }
-
-  public String getDescription() {
-    return description;
-  }
-
-  public void setDescription(String d) {
-    description = d;
-  }
-
-  public AccountGroup.UUID getOwnerGroupUUID() {
-    return ownerGroupUUID;
-  }
-
-  public void setOwnerGroupUUID(AccountGroup.UUID uuid) {
-    ownerGroupUUID = uuid;
-  }
-
-  public void setVisibleToAll(boolean visibleToAll) {
-    this.visibleToAll = visibleToAll;
-  }
-
-  public boolean isVisibleToAll() {
-    return visibleToAll;
-  }
-
-  public AccountGroup.UUID getGroupUUID() {
-    return groupUUID;
-  }
-
-  public void setGroupUUID(AccountGroup.UUID uuid) {
-    groupUUID = uuid;
-  }
-
-  public Timestamp getCreatedOn() {
-    return createdOn != null ? createdOn : auditCreationInstantTs();
-  }
-
-  public void setCreatedOn(Timestamp createdOn) {
-    this.createdOn = createdOn;
-  }
-
-  @Override
-  public boolean equals(Object o) {
-    if (!(o instanceof AccountGroup)) {
-      return false;
-    }
-    AccountGroup g = (AccountGroup) o;
-    return Objects.equals(name, g.name)
-        && Objects.equals(groupId, g.groupId)
-        && Objects.equals(description, g.description)
-        && visibleToAll == g.visibleToAll
-        && Objects.equals(groupUUID, g.groupUUID)
-        && Objects.equals(ownerGroupUUID, g.ownerGroupUUID)
-        // Treat created on epoch identical regardless if underlying value is null.
-        && getCreatedOn().equals(g.getCreatedOn());
-  }
-
-  @Override
-  public int hashCode() {
-    return Objects.hash(
-        name, groupId, description, visibleToAll, groupUUID, ownerGroupUUID, createdOn);
-  }
-
-  @Override
-  public String toString() {
-    return getClass().getSimpleName()
-        + "{"
-        + "name="
-        + name
-        + ", groupId="
-        + groupId
-        + ", description="
-        + description
-        + ", visibleToAll="
-        + visibleToAll
-        + ", groupUUID="
-        + groupUUID
-        + ", ownerGroupUUID="
-        + ownerGroupUUID
-        + ", createdOn="
-        + createdOn
-        + "}";
-  }
 }
diff --git a/javatests/com/google/gerrit/entities/AccountGroupTest.java b/javatests/com/google/gerrit/entities/AccountGroupTest.java
index a9d5188..e0a9154 100644
--- a/javatests/com/google/gerrit/entities/AccountGroupTest.java
+++ b/javatests/com/google/gerrit/entities/AccountGroupTest.java
@@ -19,11 +19,6 @@
 import static com.google.gerrit.entities.AccountGroup.UUID.fromRefPart;
 import static com.google.gerrit.entities.AccountGroup.uuid;
 
-import java.sql.Timestamp;
-import java.time.Instant;
-import java.time.LocalDateTime;
-import java.time.Month;
-import java.time.ZoneOffset;
 import org.junit.Test;
 
 public class AccountGroupTest {
@@ -31,12 +26,6 @@
   private static final String TEST_SHARDED_UUID = TEST_UUID.substring(0, 2) + "/" + TEST_UUID;
 
   @Test
-  public void auditCreationInstant() {
-    Instant instant = LocalDateTime.of(2009, Month.JUNE, 8, 19, 31).toInstant(ZoneOffset.UTC);
-    assertThat(AccountGroup.auditCreationInstantTs()).isEqualTo(Timestamp.from(instant));
-  }
-
-  @Test
   public void parseRefName() {
     assertThat(fromRef("refs/groups/" + TEST_SHARDED_UUID)).isEqualTo(uuid(TEST_UUID));
     assertThat(fromRef("refs/groups/" + TEST_SHARDED_UUID + "-2"))