Revert "Add full support for serialization of MPS Tensors (#79465)"
This reverts commit 64c2a275c4d463b936b9469da948a666e016bbb8.
Reverted https://github.com/pytorch/pytorch/pull/79465 on behalf of https://github.com/zengk95 due to this broke X linux-xenial-py3.7-clang7-onnx / test (default, 1, 2, linux.2xlarge). Not sure why since it passed on pull.
