This does nothing, and breaks the Android build since the toolchain
there uses -Wignored-qualifiers. This is the only case of it in
SwiftShader.

Change-Id: Ida06e695bd3f303200864a4fd2a797cb4c78dc15
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/29888Reviewed-by: Ben Clayton <bclayton@google.com>
Tested-by: Chris Forbes <chrisforbes@google.com>