remove some invalid entries (#10294)

I noticed that some entries don't exist (anymore).
This seems to be some kind of a consistency issue.

More specifically:
`tensorflow/contrib/ios_examples/camera/data`
`tensorflow/contrib/session_bundle/testdata/saved_model_half_plus_two`
`tensorflow/contrib/session_bundle/testdata/saved_model_half_plus_two/variables`

This is the continuation of PR #10264