Remove flaky suppression of Mac Intel tests.

Bug: dawn:1500
Change-Id: Ie0bd4a06ee42c93180c8267952cb99ccb91900db
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/127720
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Loko Kung <lokokung@google.com>
diff --git a/webgpu-cts/expectations.txt b/webgpu-cts/expectations.txt
index 388e6b2..71b42b4 100644
--- a/webgpu-cts/expectations.txt
+++ b/webgpu-cts/expectations.txt
@@ -258,12 +258,6 @@
 crbug.com/tint/0000 webgpu:shader,validation,parse,blankspace:null_characters:contains_null=true;placement="comment" [ Failure ]
 
 ################################################################################
-# Flaky on Intel Mac
-# KEEP
-################################################################################
-crbug.com/dawn/1500 [ intel-gen-9 monterey ] webgpu:api,operation,command_buffer,image_copy:origins_and_extents:initMethod="WriteTexture";checkMethod="PartialCopyT2B";* [ RetryOnFailure ]
-
-################################################################################
 # copyToTexture,canvas:color_space_conversion:* fail with swiftshader
 # The other tests about canvas and image bitmap fail with swiftshader on Linux
 # KEEP