Remove experimental Dawn DEPS CQ bots

These were experimental while we did not have the CTS running on
Dawn's CQ. We can remove them now.

Tbr=cwallez@chromium.org
Bug: dawn:396
Change-Id: I1d459b190e44374e54c47a8bc4ad37a70426847b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/21800
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>

infra/config/global/commit-queue.cfg

@@ -9,6 +9,7 @@ submit_options {
   }
 }
 config_groups {
+  name: "Dawn-CQ"
   gerrit {
     url: "https://dawn-review.googlesource.com"
     projects {
@@ -60,26 +61,6 @@ config_groups {
         name: "chromium/try/win-dawn-rel"
       }
 
-      # Experimental builders
-      # These are experimental while Dawn's API is changing and we expect
-      # to break integration with Chromium
-      builders {
-        name: "chromium/try/dawn-linux-x64-deps-rel"
-        experiment_percentage: 100
-      }
-      builders {
-        name: "chromium/try/dawn-mac-x64-deps-rel"
-        experiment_percentage: 100
-      }
-      builders {
-        name: "chromium/try/dawn-win10-x64-deps-rel"
-        experiment_percentage: 100
-      }
-      builders {
-        name: "chromium/try/dawn-win10-x86-deps-rel"
-        experiment_percentage: 100
-      }
-
       retry_config {
         single_quota: 1
         global_quota: 2