message: Remove the tensorflow import from generated code.
diff: @@ -45,5 +45,4 @@ NO_SIDE_EFFECT_CONSTRUCTORS = set(('tensorflow',))
  # TODO(mdan); Consolidate all internal imports into a single __ag module.
  COMPILED_IMPORT_STATEMENTS = (
  'from __future__ import print_function',
  - 'import tensorflow as tf',
  )
  