Revert "Mock scipy and numpy for Read the Docs (#108)" (#110)

This reverts commit 8a80433.

Author: laurenyu

doc/conf.py

@@ -15,8 +15,7 @@ def __getattr__(cls, name):
 
 
 MOCK_MODULES = ['tensorflow', 'tensorflow.core', 'tensorflow.core.framework', 'tensorflow.python',
-                'tensorflow.python.framework', 'tensorflow_serving', 'tensorflow_serving.apis',
-                'numpy', 'scipy', 'scipy.sparse']
+                'tensorflow.python.framework', 'tensorflow_serving', 'tensorflow_serving.apis']
 sys.modules.update((mod_name, Mock()) for mod_name in MOCK_MODULES)
 
 version = '1.1.2'