Revert "[autotest] opt-in to test retries in desktopui_WebRTC test"

Since the original change wasn't back ported these branches can continue to work utilizing the older retry mechanism.

This reverts commit 669d85f4628e6911a0b5031ee299ad20942ed3af

Change-Id: Ifb4972974bda6f0a11b4b609cd91c7a65c9c873e
Reviewed-on: https://gerrit.chromium.org/gerrit/47236
Reviewed-by: Scott Zawalski <scottz@chromium.org>
Tested-by: Scott Zawalski <scottz@chromium.org>
diff --git a/client/site_tests/desktopui_WebRTC/desktopui_WebRTC.py b/client/site_tests/desktopui_WebRTC/desktopui_WebRTC.py
index 1110571..53b5525 100644
--- a/client/site_tests/desktopui_WebRTC/desktopui_WebRTC.py
+++ b/client/site_tests/desktopui_WebRTC/desktopui_WebRTC.py
@@ -2,9 +2,6 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-#pylint: disable-msg=C0111
-
-from autotest_lib.client.common_lib import error
 from autotest_lib.client.cros import chrome_test
 
 
@@ -13,7 +10,4 @@
 
 
     def run_once(self):
-        try:
-            self.run_pyauto_functional(suite='WEBRTC')
-        except Exception as err:
-            raise error.TestFailRetry(err)
+        self.run_pyauto_functional(suite='WEBRTC')