Revert "Promote win-libfuzzer-asan-rel CQ bot out of experimental."

This reverts commit 58730f7f.

Reason for revert: There's no tot bot for this config (https://crbug.com/903078)

Original change's description:
> Promote win-libfuzzer-asan-rel CQ bot out of experimental.
> 
> Cycle time and failure rate looks good.
> 
> Bug: 893614
> Change-Id: I43fcdf7f8e1b920ec784c0c67025e72aa7169873
> Reviewed-on: https://chromium-review.googlesource.com/c/1299973
> Reviewed-by: John Budorick <jbudorick@chromium.org>
> Commit-Queue: Ben Pastene <bpastene@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#603113}

TBR=dpranke@chromium.org,bpastene@chromium.org,jbudorick@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 893614
Change-Id: I10200022b338edf0cc0ee7100f7ff417b7c19eb8
Reviewed-on: https://chromium-review.googlesource.com/c/1325982Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606394}

infra/config/branch/cq.cfg

@@ -172,7 +172,10 @@ verifiers {
         path_regexp: "third_party/blink/renderer/modules/webgl/.+"
         path_regexp: "ui/gl/.+"
       }
-      builders { name: "win-libfuzzer-asan-rel" }
+      builders {
+        name: "win-libfuzzer-asan-rel"
+        experiment_percentage: 100
+      }
       builders { name: "win10_chromium_x64_rel_ng" }
       builders {
         name: "win7_chromium_rel_loc_exp"