Add attr in test deps to fix a travis issue and remove gsutil since it

isn't being used in tests.

PiperOrigin-RevId: 264650849

Author: afrozenator

setup.py

@@ -66,11 +66,13 @@
         'tensorflow-hub': ['tensorflow-hub>=0.1.1'],
         'tests': [
             'absl-py',
+            # Needed to fix a Travis pytest error.
+            # https://github.com/Julian/jsonschema/issues/449#issuecomment-411406525
+            'attrs>=17.4.0',
             'pytest>=3.8.0',
             'mock',
             'pylint',
             'jupyter',
-            'gsutil',
             'matplotlib',
             # Need atari extras for Travis tests, but because gym is already in
             # install_requires, pip skips the atari extras, so we instead do an