Clean up tile test.
Clean up tile test.


Former-commit-id: ad71fd480c1f21de103b8f6f36010cc476b0cb45
omegaga/peloton,omegaga/peloton,larryxiao/peloton-1,omegaga/peloton,amaliujia/CMUDB-peloton,larryxiao/peloton,larryxiao/peloton,ranxian/peloton,larryxiao/peloton-1,amaliujia/CMUDB-peloton,larryxiao/peloton,omegaga/peloton,amaliujia/CMUDB-peloton,omegaga/peloton,amaliujia/CMUDB-peloton,amaliujia/CMUDB-peloton,larryxiao/peloton-1,larryxiao/peloton,omegaga/peloton,larryxiao/peloton,ranxian/peloton,larryxiao/peloton-1,larryxiao/peloton-1,omegaga/peloton,larryxiao/peloton,larryxiao/peloton,ranxian/peloton,amaliujia/CMUDB-peloton,ranxian/peloton,ranxian/peloton,amaliujia/CMUDB-peloton,larryxiao/peloton-1,ranxian/peloton,larryxiao/peloton-1