[cq.cfg] Make ios-simulator 100% experimental

Unfortunately this builder seems to have a recipe bug with
analyze and the way it runs one of the test suites.

R=jchinlee@chromium.org, tandrii@chromium.org
TBR=jbudorick@chromium.org

Bug: 832483
Change-Id: I64d774535b52a92981a597d6c23e45659ae6aae1
Reviewed-on: https://chromium-review.googlesource.com/1011825Reviewed-by: Jao-ke Chin-Lee <jchinlee@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550512}

infra/config/branch/cq.cfg

@@ -141,7 +141,11 @@ verifiers {
       }
       builders {
         name: "ios-simulator"
-        equivalent_to { bucket: "luci.chromium.try" percentage: 0 }
+        # https://crbug.com/832483
+        # Unfortunately experiment_percentage is mutually exclusive with
+        # equivalent_to, so that's commented out for now.
+        # equivalent_to { bucket: "luci.chromium.try" percentage: 0 }
+        experiment_percentage: 100
       }
       # https://crbug.com/739556
       builders {