Integrated: 8260640: Cleanup dead code and comments imported from OpenGL

[Kevin Rushforth]

Looks like "make clean" isn't clean enough if it didn't clear out the 
generated header files. It might be worth filing a bug against the 
infrastructure/build.

-- Kevin

On 1/29/2021 9:12 AM, Jayathirth D V wrote:
> I did clean build (both debug and release) after this change and also did sanity testing.Build didnt fail in my local Mac.
>
> Now if I clone new repo and build it is failing. Thanks Kevin for root cause and fix:)
>
> Regards,
> Jay