Revert "[ios] ios-simulator-cronet tryjob src side Chromium config"

This reverts commit f039e78b.

Reason for revert: The wrong bot was migrated here.

Original change's description:
> [ios] ios-simulator-cronet tryjob src side Chromium config
> 
> ios-simulator-cronet under chromium.fyi has already been migrated.
> Missed migrating the trybot with it.
> 
> Bug: 1055164,912681
> Change-Id: Ia58340308ba719dc6f39cf65ab40f73c4c89929b
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2120051
> Commit-Queue: Jeff Yoon <jeffyoon@chromium.org>
> Reviewed-by: John Budorick <jbudorick@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#753391}

TBR=agable@chromium.org,jbudorick@chromium.org,jeffyoon@chromium.org

Change-Id: I09d5cfeab541bbaf6f7d1b8382e273e5d621601b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1055164, 912681
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2121420Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Jeff Yoon <jeffyoon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#753438}

infra/config/generated/cr-buildbucket.cfg

@@ -15553,7 +15553,7 @@ buckets: <
       dimensions: "cpu:x86-64"
       dimensions: "os:Mac"
       recipe: <
-        name: "chromium_trybot"
+        name: "ios/try"
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
         cipd_version: "refs/heads/master"
         properties_j: "$build/goma:{\"rpc_extra_params\":\"?prod\",\"server_host\":\"goma.chromium.org\"}"

infra/config/versioned/trunk/buckets/try.star

@@ -517,7 +517,6 @@ try_.chromium_mac_ios_builder(
 
 try_.chromium_mac_ios_builder(
     name = 'ios-simulator-full-configs',
-    executable = 'recipe:chromium_trybot',
     tryjob = try_.job(
         location_regexp = [
             '.+/[+]/ios/.+',

tools/mb/mb_config.pyl

@@ -470,6 +470,7 @@
       'Mac Builder (dbg)': 'gpu_tests_debug_bot',
       'ios-device': 'ios_release_device_compile_only',
       'ios-simulator': 'ios_error',
+      'ios-simulator-cronet': 'ios_error',
       'ios-simulator-full-configs': 'ios_error',
       'WebKit Mac10.13 (retina)': 'release_bot',
     },
@@ -884,7 +885,7 @@
       'ios-device': 'ios_release_device_compile_only',
       'ios-simulator': 'ios_error',
       'ios-simulator-full-configs': 'ios_error',
-      'ios-simulator-cronet': 'ios_cronet',
+      'ios-simulator-cronet': 'ios_error',
       'ios-simulator-code-coverage': 'clang_code_coverage_ios',
       'ios-simulator-cr-recipe': 'ios_simulator_debug_static_bot',
       'mac-osxbeta-rel': 'gpu_tests_release_trybot_deterministic_mac',