Update conf.py with MagicMock

This might solve the problem in readthedocs. If not, changes must be reverted.

docs/source/conf.py

@@ -18,21 +18,20 @@
 
 sys.path.insert(0, os.path.abspath("../../"))
 
-# class Mock(MagicMock):
-#    @classmethod
-#    def __getattr__(cls, name):
-#        return MagicMock()
-#
-# MOCK_MODULES = ['ase', 'ase.calculators', 'ase.calculators.calculator',
-#                'ase.neighborlist' 'torch']
-#
-# sys.modules.update((mod_name, Mock()) for mod_name in MOCK_MODULES)
+class Mock(MagicMock):
+   @classmethod
+   def __getattr__(cls, name):
+       return MagicMock()
+
+MOCK_MODULES = ['torch']
+
+sys.modules.update((mod_name, Mock()) for mod_name in MOCK_MODULES)
 
 
 # -- Project information -----------------------------------------------------
 
 project = "ML4Chem"
-copyright = "2019, Muammar El Khatib"
+copyright = "2020, Muammar El Khatib"
 author = "Muammar El Khatib"
 
 # The short X.Y version