Remove --target-devices-file

As was done in https://chromium-review.googlesource.com/704191

Bug: None
Change-Id: I3e7a5f9e5e2111ddba9218faec15858b86fcab19
Reviewed-on: https://webrtc-review.googlesource.com/7612
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Commit-Queue: Edward Lemur <ehmaldonado@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20198}

tools_webrtc/mb/mb.py

@@ -1055,9 +1055,6 @@ class MetaBuildWrapper(object):
                  '--logdog-bin-cmd', '../../bin/logdog_butler',
                  '--logcat-output-file', '${ISOLATED_OUTDIR}/logcats',
                  '--store-tombstones']
-
-      if test_type != 'junit_test':
-        cmdline += ['--target-devices-file', '${SWARMING_BOT_FILE}']
     elif test_type == "script":
       cmdline = ['../../' + self.ToSrcRelPath(isolate_map[target]['script'])]
     else:

tools_webrtc/mb/mb_unittest.py

@@ -383,7 +383,6 @@ class UnitTest(unittest.TestCase):
         '--logdog-bin-cmd', '../../bin/logdog_butler',
         '--logcat-output-file', '${ISOLATED_OUTDIR}/logcats',
         '--store-tombstones',
-        '--target-devices-file', '${SWARMING_BOT_FILE}',
     ])
 
   def test_gn_gen_swarming_android_junit_test(self):