[autotest] Remove the file_bugs option from test_push.py

The file_bugs related functions have been removed from test_push
recently, so there is no need for this option.

BUG=None
TEST=unittest

Change-Id: I05a86ea3ed3dc49822fc16bc1755cf9fd33717e6
Reviewed-on: https://chromium-review.googlesource.com/349751
Commit-Ready: Shuqian Zhao <shuqianz@chromium.org>
Tested-by: Shuqian Zhao <shuqianz@chromium.org>
Reviewed-by: Dan Shi <dshi@google.com>
diff --git a/site_utils/test_push.py b/site_utils/test_push.py
index 03fc60b..7917d2c 100755
--- a/site_utils/test_push.py
+++ b/site_utils/test_push.py
@@ -170,9 +170,6 @@
     parser.add_argument('-p', '--pool', dest='pool', default='bvt')
     parser.add_argument('-u', '--num', dest='num', type=int, default=3,
                         help='Run on at most NUM machines.')
-    parser.add_argument('-f', '--file_bugs', dest='file_bugs', default='True',
-                        help='File bugs on test failures. Must pass "True" or '
-                             '"False" if used.')
     parser.add_argument('-e', '--email', dest='email', default=None,
                         help='Email address for the notification to be sent to '
                              'after the script finished running.')
@@ -246,8 +243,7 @@
            '-b', board,
            '-i', build,
            '-p', arguments.pool,
-           '-u', str(arguments.num),
-           '-f', arguments.file_bugs]
+           '-u', str(arguments.num)]
     if create_and_return:
         cmd += ['-c']