Revert "Graphite: Enable cc/viz pixel tests on windows"

This reverts commit 8539a82873.

Reason for revert: Causing ASAN failures on Windows https://crbug.com/1491078.

Original change's description:
> Graphite: Enable cc/viz pixel tests on windows
>
> Bug: 1442381
> Change-Id: I59c037e5e22a2d7f5ed284b1a6e466bfe4b48011
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4860781
> Reviewed-by: Peng Huang <penghuang@chromium.org>
> Reviewed-by: Sunny Sachanandani <sunnyps@chromium.org>
> Commit-Queue: Saifuddin Hitawala <hitawala@chromium.org>
> Reviewed-by: Brian Osman <brianosman@google.com>
> Cr-Commit-Position: refs/heads/main@{#1206060}

Bug: 1442381
Change-Id: Iba29a7315aa8f92217352c4ce94f13cff7203b71
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4922598
Owners-Override: Kirubel Aklilu <kaklilu@chromium.org>
Reviewed-by: Nate Chapin <japhet@chromium.org>
Commit-Queue: Kirubel Aklilu <kaklilu@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1207193}

skia/features.gni

@@ -15,7 +15,7 @@ declare_args() {
   skia_use_metal = is_mac && !is_official_build
 
   # Enable gtests using SkiaRenderer on Skia Graphite.
-  enable_skia_graphite_gtests = is_mac || is_win
+  enable_skia_graphite_gtests = is_mac
 }
 
 # Skia only needs to support GPU rasterization if we use the full Chromium