Remove CUB library if CUDA 11.0 is detected
Remove CUB library if CUDA 11.0 is detected

In some cases where user upgrades to CUDA 11.0 after running it with CUDA 10.2 or lower, we need to delete the previously downloaded CUB library.
GOMC-WSU/GOMC,GOMC-WSU/GOMC,GOMC-WSU/GOMC,GOMC-WSU/GOMC,GOMC-WSU/GOMC