[DOC] remove surplus requirements (cont.)

docs/conf.py

@@ -31,6 +31,8 @@ MOCK_MODULES = [
     "torch.utils",
     "torch.optim",
     "torchvision.transform",
+    "torch.utils.data",
+    "torch.utils.data.sampler"
 ]
 sys.modules.update((mod_name, Mock()) for mod_name in MOCK_MODULES)