Removes a load of noise throughout the cpp file.

Bug: b/128539387
Change-Id: Ic9fa9361c4b7dc6258833e2ce58db50b5e81b11d
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/26530Tested-by: Ben Clayton <headlessclayton@gmail.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>