This flag is always true now and is being removed from GN.

Bug: angleproject:4026
Bug: angleproject:2344
Change-Id: I7e90d95a41cd4a9e054e3e102578db3323e999e8
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1951525Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>