Remove now-renamed java targets

mojo/public/java/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/rules.gni")
 
-# TODO(agrieve): Remove once no longer used by downstream.
-java_group("bindings") {
-  deps = [
-    ":bindings_java",
-  ]
-}
-
 android_library("system_java") {
   java_files = [
     "system/src/org/chromium/mojo/system/Core.java",
     "system/src/org/chromium/mojo/system/DataPipe.java",
     "system/src/org/chromium/mojo/system/Flags.java",
     "system/src/org/chromium/mojo/system/Handle.java",
     "system/src/org/chromium/mojo/system/InvalidHandle.java",
     "system/src/org/chromium/mojo/system/MessagePipeHandle.java",
     "system/src/org/chromium/mojo/system/MojoException.java",
     "system/src/org/chromium/mojo/system/MojoResult.java",
@@ skipping 38 matching lines @@
     "bindings/src/org/chromium/mojo/bindings/Union.java",
   ]
 
   deps = [
     ":system_java",
     "//base:base_java",
   ]
 
   srcjar_deps = [ "../interfaces/bindings:bindings_java_sources" ]
 }