Remove unnecessary move and fix a build failure
Remove unnecessary move and fix a build failure

This silences a pessimizing move warning treated as an error.
Sample CI build failure caused by this:
https://github.com/GPUOpen-Drivers/llpc/runs/2287221496?check_suite_focus=true.

googlestadia/xgl,googlestadia/xgl,googlestadia/xgl,GPUOpen-Drivers/xgl,GPUOpen-Drivers/xgl,GPUOpen-Drivers/xgl