Remove buildbot annotation for video_quality_loopback_test.py

In https://codereview.webrtc.org/2704073002 an attempt was made to make
the buildbot step show up as orange, which didn't work. The step showed
up as a test failure, which will confuse sheriffs.

BUG=webrtc:7185
TBR=mandermo@webrtc.org

Review-Url: https://codereview.webrtc.org/2699383002 .
Cr-Commit-Position: refs/heads/master@{#16699}

webrtc/examples/androidtests/video_quality_loopback_test.py

@@ -51,11 +51,10 @@ def _ParseArgs():
 
 
 def main():
-  print '@@@STEP_WARNINGS@@@'
   print 'This test is currently disabled (https://bugs.webrtc.org/7185)'
-  print '@@@STEP_LINK@Disabled@https://bugs.webrtc.org/7185@@@ (webrtc:7185)'
-  sys.exit(0)
+  return 0
 
+  # pylint: disable=W0101
   logging.basicConfig(level=logging.INFO)
 
   args = _ParseArgs()