Removed unnecessary assertion

BUG=None

Review-Url: https://codereview.chromium.org/2102763002
Cr-Original-Commit-Position: refs/heads/master@{#402366}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 30edb12909579540d70fcb3713ed37c3c65f26ee

android/gyp/util/proguard_util.py

@@ -98,7 +98,6 @@ class ProguardCmdBuilder(object):
       '-forceprocessing',
     ]
     if self._tested_apk_info_path:
-      assert len(self._configs) == 1
       tested_apk_info = build_utils.ReadJson(self._tested_apk_info_path)
       self._configs += tested_apk_info['configs']
       self._injars = [