Revert "[ios] Added ios_clean_chrome_unittests to fyi bot."

This reverts commit 9bc1d086.

Reason for revert: This suite is failing on iPhone 5 and iPad Retina. Please fix or disable for those configurations then re-land.

Failures can be seen here https://build.chromium.org/p/chromium.fyi/builders/ios-simulator/builds/7827

Original change's description:
> [ios] Added ios_clean_chrome_unittests to fyi bot.
> 
> Bug: none
> Change-Id: I0a69f59192e400fba4ecbf563b4de64b6247f249
> Reviewed-on: https://chromium-review.googlesource.com/570841
> Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
> Commit-Queue: Kurt Horimoto <kkhorimoto@chromium.org>
> Commit-Queue: Ed Chin <edchin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#486881}

TBR=rohitrao@chromium.org,marq@chromium.org,sdefresne@chromium.org,kkhorimoto@chromium.org,edchin@chromium.org

Change-Id: I18acc5e44ac6d1db1836881f526ef478cbadd15d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: none
Reviewed-on: https://chromium-review.googlesource.com/572400Reviewed-by: Mike Dougherty <michaeldo@chromium.org>
Commit-Queue: Mike Dougherty <michaeldo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486898}

ios/build/bots/chromium.fyi/ios-simulator.json

@@ -80,48 +80,6 @@
       "device type": "iPhone 6s",
       "os": "10.0",
       "xcode version": "8.0"
-    },
-    {
-      "app": "ios_clean_chrome_unittests",
-      "device type": "iPhone 5",
-      "os": "10.0",
-      "xcode version": "8.0"
-    },
-    {
-      "app": "ios_clean_chrome_unittests",
-      "device type": "iPhone 6s",
-      "os": "10.0",
-      "xcode version": "8.0"
-    },
-    {
-      "app": "ios_clean_chrome_unittests",
-      "device type": "iPhone 6s Plus",
-      "os": "10.0",
-      "xcode version": "8.0"
-    },
-    {
-      "app": "ios_clean_chrome_unittests",
-      "device type": "iPad Air 2",
-      "os": "10.0",
-      "xcode version": "8.0"
-    },
-    {
-      "app": "ios_clean_chrome_unittests",
-      "device type": "iPad Retina",
-      "os": "10.0",
-      "xcode version": "8.0"
-    },
-    {
-      "app": "ios_clean_chrome_unittests",
-      "device type": "iPhone 5",
-      "os": "9.0",
-      "xcode version": "8.0"
-    },
-    {
-      "app": "ios_clean_chrome_unittests",
-      "device type": "iPad Air 2",
-      "os": "9.0",
-      "xcode version": "8.0"
     }
   ]
 }