We are not maintaining D3D9 for performance and reducing the number
of perf tests will speed up the bots.

Bug: angleproject:4943 
Change-Id: Ib4ddad2cbfefcf6fccf3307df3bac7565ef246f4
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2352478Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>