Remove Buck based build

Change-Id: I473c7f3d7ae882c7cce3374700c7adfeb1037ca9

.gitignore

diff --git a/.gitignore b/.gitignore
index 1e10b15..7b9a01e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,7 +3,4 @@
 /.project
 /.settings/org.maven.ide.eclipse.prefs
 /.settings/org.eclipse.m2e.core.prefs
-/.buckd
-/buck-cache
-/buck-out
 *.iml

BUILD

diff --git a/BUILD b/BUILD
deleted file mode 100644
index d6d4eeb..0000000
--- a/BUILD
+++ /dev/null
@@ -1,11 +0,0 @@
-load("//tools/bzl:plugin.bzl", "gerrit_plugin")
-
-gerrit_plugin(
-    name = "singleusergroup",
-    srcs = glob(["src/main/java/**/*.java"]),
-    manifest_entries = [
-        "Gerrit-PluginName: singleusergroup",
-        "Gerrit-Module: com.googlesource.gerrit.plugins.singleusergroup.SingleUserGroup$Module",
-    ],
-    resources = glob(["src/main/resources/**/*"]),
-)