Revert webrtc/build/mb_config.pyl accidental change

In https://codereview.webrtc.org/2320043002/ a mb_config.pyl
change that belonged to https://codereview.webrtc.org/2325063002/
accidentally was included.
This reverts it.

TBR=ehmaldonado@webrtc.org
BUG=

Review URL: https://codereview.webrtc.org/2319123005 .

Cr-Commit-Position: refs/heads/master@{#14164}
diff --git a/webrtc/build/mb_config.pyl b/webrtc/build/mb_config.pyl
index d4909d0..98460f4 100644
--- a/webrtc/build/mb_config.pyl
+++ b/webrtc/build/mb_config.pyl
@@ -212,10 +212,10 @@
       'ios', 'gn', 'debug_static_bot', 'x64'
     ],
     'ios_gyp_debug_static_bot_arm64_device': [
-      'ios', 'gyp_limited_support_build', 'debug_static_bot', 'arm64', 'device'
+      'ios', 'gyp', 'debug_static_bot', 'arm64', 'device'
     ],
     'ios_gyp_release_bot_arm64_device': [
-      'ios', 'gyp_limited_support_build', 'release_bot', 'arm64', 'device'
+      'ios', 'gyp', 'release_bot', 'arm64', 'device'
     ],
 
     # Linux, Mac and Windows