cuda : revert CUDA pool stuff (#3944)
* Revert "cuda : add ROCM aliases for CUDA pool stuff (#3918)"
This reverts commit 629f917cd6b96ba1274c49a8aab163b1b189229d.
* Revert "cuda : use CUDA memory pool with async memory allocation/deallocation when available (#3903)"
This reverts commit d6069051de7165a4e06662c89257f5d2905bb156.
ggml-ci
