Remove all blimp client code.

blimp/client/core/common/BUILD.gn

Index: blimp/client/core/common/BUILD.gn
diff --git a/blimp/client/core/common/BUILD.gn b/blimp/client/core/common/BUILD.gn
deleted file mode 100644
index e9b9a7a838264017b84033f0f066534f1b8b4d46..0000000000000000000000000000000000000000
--- a/blimp/client/core/common/BUILD.gn
+++ /dev/null
@@ -1,24 +0,0 @@
-# Copyright 2016 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.
-
-if (is_android) {
-  import("//build/config/android/config.gni")
-  import("//build/config/android/rules.gni")
-}
-
-if (is_android) {
-  android_library("common_java") {
-    visibility = [
-      "//blimp/client/app:blimp_test_java_core_deps",
-      "//blimp/client/core/*",
-    ]
-
-    java_files = [ "android/java/src/org/chromium/blimp/core/common/PreferencesUtil.java" ]
-
-    deps = [
-      "//base:base_java",
-      "//blimp/client/public:public_headers_java",
-    ]
-  }
-}