remove unused file rename.sh

[0xgj]

This change is 

[k8s-ci-robot]

Hi @caogj. Thanks for your PR.

I'm waiting for a kubernetes or tensorflow member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[coveralls]

Coverage decreased (-0.1%) to 31.439% when pulling 9045675 on caogj:remove_unused_file into 357a509 on tensorflow:master.

[ConnorDoyle]

/ok-to-test