cros_mark_android_as_stable: remove android_gts_build_branch

BUG=chromium:1074145
TEST=./run_tests; ./api/compile_build_api_proto

Cq-Depend: chromium:2162417
Change-Id: I6d266af11008841fa7e802294e9146e60cda0583
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/2162670
Commit-Queue: Shao-Chuan Lee <shaochuan@chromium.org>
Tested-by: Shao-Chuan Lee <shaochuan@chromium.org>
Reviewed-by: Kazuhiro Inaba <kinaba@chromium.org>
Reviewed-by: Hidehiko Abe <hidehiko@chromium.org>
Reviewed-by: Sean Abraham <seanabraham@chromium.org>
Reviewed-by: David Burger <dburger@chromium.org>
diff --git a/api/controller/android.py b/api/controller/android.py
index d216afc..7ce1d6c 100644
--- a/api/controller/android.py
+++ b/api/controller/android.py
@@ -60,7 +60,6 @@
   package_name = input_proto.package_name
   android_build_branch = input_proto.android_build_branch
   android_version = input_proto.android_version
-  android_gts_build_branch = input_proto.android_gts_build_branch
 
   # Assume success.
   output_proto.status = android_pb2.MARK_STABLE_STATUS_SUCCESS
@@ -73,8 +72,7 @@
         android_build_branch=android_build_branch,
         chroot=chroot,
         build_targets=build_targets,
-        android_version=android_version,
-        android_gts_build_branch=android_gts_build_branch)
+        android_version=android_version)
   except packages.AndroidIsPinnedUprevError as e:
     # If the uprev failed due to a pin, CI needs to unpin and retry.
     android_atom_to_build = e.new_android_atom