Revert "smallpt - Added copy assignment to vectors."
Revert "smallpt - Added copy assignment to vectors."

This reverts commit 67f8af3ba601e10247c9419bb9c9438d04e13d08.

ProGTX/sycl-gtx,ProGTX/sycl-gtx,ProGTX/sycl-gtx,ProGTX/sycl-gtx