Remove android_support_annotations target.

build/secondary/third_party/android_tools/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")
 
 config("cpu_features_include") {
   include_dirs = [ "ndk/sources/android/cpufeatures" ]
 }
 
@@ skipping 38 matching lines @@
   custom_package = "android.support.design"
 }
 
 android_java_prebuilt("android_support_design_java") {
   deps = [
     ":android_support_design_resources",
   ]
   jar_path = "$android_sdk_root/extras/android/support/design/libs/android-support-design.jar"
 }
 
-android_java_prebuilt("android_support_annotations_javalib") {
-  jar_path = "$android_sdk_root/extras/android/support/annotations/android-support-annotations.jar"
-}
-
 java_prebuilt("android_support_multidex_java") {
   supports_android = true
   jar_path = "$android_sdk_root/extras/android/support/multidex/library/libs/android-support-multidex.jar"
 }
 
 android_java_prebuilt("android_support_v13_java") {
   jar_path =
       "$android_sdk_root/extras/android/support/v13/android-support-v13.jar"
 }
 
@@ skipping 74 matching lines @@
     ":android_support_v7_recyclerview_java",
   ]
   jar_path = "$android_sdk_root/extras/android/support/v17/leanback/libs/android-support-v17-leanback.jar"
 }
 
 # TODO(jbudorick): Remove this once net_java_test_support no longer needs it.
 android_java_prebuilt("legacy_http_javalib") {
   testonly = true
   jar_path = "$android_sdk/optional/org.apache.http.legacy.jar"
 }