Remove no longer defined experimental builder from cq.cfg.

TBR=ehmaldonado@chromium.org

No-Try: True
Change-Id: Icab6f6d500a10a48b1916901b638b9ff929128bf
Reviewed-on: https://chromium-review.googlesource.com/1014341
Commit-Queue: Andrii Shyshkalov <tandrii@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551046}

infra/config/branch/cq.cfg

@@ -39,12 +39,6 @@ verifiers {
       builders { name: "mac_chromium_compile_dbg_ng" }
       builders { name: "mac_chromium_rel_ng" }
       builders { name: "win_chromium_compile_dbg_ng" }
-
-      # TODO(ehmaldonado): remove this fake builder.
-      builders {
-        name: "linux_chromium_compile_rel_ng_patch_on_gclient"
-        experiment_percentage: 5
-      }
     }
     buckets {
       name: "master.tryserver.chromium.android"