Remove unused values import and dep from viz_main.mojom

Bug: 799482
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel
Change-Id: I2ff7cf5de96d7a9cb479202edc362a7f06248e8e
Reviewed-on: https://chromium-review.googlesource.com/1017865Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: vmpstr <vmpstr@chromium.org>
Commit-Queue: Oksana Zhuravlova <oksamyt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#552239}

services/viz/privileged/interfaces/BUILD.gn

@@ -11,7 +11,6 @@ mojom("interfaces") {
 
   public_deps = [
     "//components/discardable_memory/public/interfaces",
-    "//mojo/common:common_custom_types",
     "//services/viz/privileged/interfaces/compositing",
     "//services/viz/privileged/interfaces/gl",
     "//services/viz/public/interfaces",

services/viz/privileged/interfaces/viz_main.mojom

@@ -4,7 +4,6 @@
 
 module viz.mojom;
 
-import "mojo/common/values.mojom";
 import "components/discardable_memory/public/interfaces/discardable_shared_memory_manager.mojom";
 import "services/viz/public/interfaces/compositing/compositing_mode_watcher.mojom";
 import "services/viz/privileged/interfaces/compositing/frame_sink_manager.mojom";