Revert "[composite compliance] matrix_exp (#81225)"
This reverts commit 367c6952373a8a10a3f7f25693fc16da99f90382.
Reverted https://github.com/pytorch/pytorch/pull/81225 on behalf of https://github.com/clee2000 due to broke functorch https://github.com/pytorch/pytorch/runs/7345901504?check_suite_focus=true
