Enable YouTube tests in internal bot

Change-Id: Ife1365dae5dc78326ac34a55473c547bedb1b5a6
diff --git a/tools/run_on_app.py b/tools/run_on_app.py
index ae8001a..16db28d 100755
--- a/tools/run_on_app.py
+++ b/tools/run_on_app.py
@@ -188,8 +188,6 @@
 # do Bug: #BUG in the commit message of disabling to ensure re-enabling
 DISABLED_PERMUTATIONS = [
   # (app, version, type), e.g., ('gmail', '180826.15', 'deploy'),
-  ('youtube', '13.37', 'deploy'), # b/120977564
-  ('youtube', '15.08', 'deploy'), # b/150267318
   ('youtube', '15.09', 'deploy'), # b/150267318
 ]