Remove ios_chrome_unittests from uirefresh_unittests

since it's included in screen_size_dependent_tests.

Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: Ida1867fd77e401909ea21e3bdce491158759ff05
Reviewed-on: https://chromium-review.googlesource.com/1133898
Commit-Queue: Lindsay Pasricha <lindsayw@chromium.org>
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575401}

ios/build/bots/tests/uirefresh_unittests.json

@@ -5,9 +5,6 @@
     "UIRefreshPhase1 flag."
   ],
   "tests": [
-    {
-      "app": "ios_chrome_unittests"
-    },
     {
       "app": "ios_net_unittests"
     },