Remove v8_win_dbg from the CQ experimental to reduce win pending time on CQ

R=machenbach@chromium.org

No-Try: true
Change-Id: Ic218c155bf1fd5eb3065bd36278e5ee7c61ae400
Reviewed-on: https://chromium-review.googlesource.com/864326Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50541}

infra/config/cq.cfg

@@ -106,10 +106,6 @@ verifiers {
         triggered_by: "v8_win64_rel_ng"
       }
       builders { name: "v8_win_compile_dbg" }
-      builders {
-        name: "v8_win_dbg"
-        experiment_percentage: 100
-      }
       builders { name: "v8_win_nosnap_shared_rel_ng" }
       builders {
         name: "v8_win_nosnap_shared_rel_ng_triggered"