Revert "Add Win x86 Clang Perf/Test jobs."

This reverts commit 40091fd4fc453eb514bf7ca903326fa3538ab6c9.

Reason for revert: Need to revert dependency https://skia-review.googlesource.com/c/skia/+/114093

Original change's description:
> Add Win x86 Clang Perf/Test jobs.
> 
> Also switch CQ Win 32-bit Build from MSVC to Clang.
> 
> No-Try: true
> Change-Id: Ic312ee611b1e99143480840c08a9266a4d8b448b
> Reviewed-on: https://skia-review.googlesource.com/113672
> Commit-Queue: Ben Wagner <benjaminwagner@google.com>
> Reviewed-by: Mike Klein <mtklein@google.com>

TBR=mtklein@google.com,benjaminwagner@google.com

Change-Id: I6a13e97df461bd61eac92bbc3c498146b5322a4a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/114421
Commit-Queue: Ben Wagner <benjaminwagner@google.com>
Reviewed-by: Ben Wagner <benjaminwagner@google.com>
3 files changed