fixed type checking errors in fuse.py (#66799)
Summary:
Fixes [Issue#70](https://github.com/MLH-Fellowship/pyre-check/issues/70)
This PR fixes the type checking error that was found in fuse.py as follows:
torch/quantization/fx/fuse.py:34:13 Incompatible variable type [9]: fuse_custom_config_dict is declared to have type `Dict[str, typing.Any]` but is used as type `None`.
Signed-off-by: Onyemowo Agbo
Pull Request resolved: https://github.com/pytorch/pytorch/pull/66799
Reviewed By: 0xedward
Differential Revision: D31961462
Pulled By: onionymous
fbshipit-source-id: 7481afc07152ba13f3224e4ad198fd8e2c34c880
