remove test (#58617)

dev/devicelab/manifest.yaml

@@ -445,13 +445,6 @@ tasks:
     stage: devicelab_ios
     required_agent_capabilities: ["mac/ios"]
 
-  tiles_scroll_perf_iphonexs__timeline_summary:
-    description: >
-      Measures the runtime performance of the tiles tab in the Complex Layout sample app on iPhone XS.
-    stage: devicelab_ios
-    # TODO(keyonghan): change with https://github.com/flutter/flutter/issues/50383
-    required_agent_capabilities: ["mac/ios"]
-
   platform_views_scroll_perf_ios__timeline_summary:
     description: >
       Measures the runtime performance of platform views in the Complex Layout sample app on iPhone 6.