Revert "[mlir][gpu] Refactor ConvertGpuLaunchFuncToCudaCalls pass."
This reverts commit cdb6f05e2d5f0132956020e6b4990af0206c066f.
The build is broken with:
You have called ADD_LIBRARY for library obj.MLIRGPUtoCUDATransforms without any source files. This typically indicates a problem with your CMakeLists.txt file