Fixed clang unused variable error
Fixed clang unused variable error

Change-Id: If8f1507a9dba4d8aa0ae6ea2f7c3ea101a0c9144

googlestadia/llpc,GPUOpen-Drivers/llpc,GPUOpen-Drivers/llpc,googlestadia/llpc,googlestadia/llpc,GPUOpen-Drivers/llpc,googlestadia/llpc,GPUOpen-Drivers/llpc,googlestadia/llpc,GPUOpen-Drivers/llpc