Remove setting AWS logging for S3 file system.

Was causing issues with tests. Can repro test failures on Macs by running...

bazel test --config=s3  --cache_test_results=no --test_output=streamed
//tensorflow/core/kernels:control_flow_ops_test

Possible reason for error is symbol collision with AWS logging code.
One possible solution would be to split out another shared object for
the S3 filesystem op which does not link in libtensorflow_framework.so.
This is done, for example, by libforestprotos.so in
tensorflow/contrib/tensor_forest/BUILD

PiperOrigin-RevId: 171246381