delete .int overload (#423)

Summary:
Pull Request resolved: https://github.com/pytorch/executorch/pull/423

This hasnt been able to be generated for a while in favor of the .scalar overload. The previous diff should have cleaned up the last model being used that had it present.

Reviewed By: cccclai

Differential Revision: D49289930

fbshipit-source-id: a0de3c3e0817bfc4edb1a225d121de731610e221