--- a/testing/mozharness/configs/single_locale/mozilla-central_android-api-15.py
+++ b/testing/mozharness/configs/single_locale/mozilla-central_android-api-15.py
@@ -1,18 +1,16 @@
 BRANCH = "mozilla-central"
 MOZ_UPDATE_CHANNEL = "nightly"
 MOZILLA_DIR = BRANCH
 OBJDIR = "obj-l10n"
 EN_US_BINARY_URL = "http://archive.mozilla.org/pub/mobile/nightly/latest-%s-android-api-15/en-US" % BRANCH
 HG_SHARE_BASE_DIR = "/builds/hg-shared"
 
 config = {
-    # XXX For Try
-    "update_gecko_source_to_enUS": False,
     "branch": BRANCH,
     "log_name": "single_locale",
     "objdir": OBJDIR,
     "is_automation": True,
     "buildbot_json_path": "buildprops.json",
     "force_clobber": True,
     "clobberer_url": "https://api.pub.build.mozilla.org/clobberer/lastclobber",
     "locales_file": "%s/mobile/android/locales/all-locales" % MOZILLA_DIR,