Remove flutter gallery test family (Mac/ios) from prod pool (#89247)

.ci.yaml

@@ -2922,16 +2922,6 @@ targets:
       task_name: flavors_test_ios
     scheduler: luci
 
-  - name: Mac_ios flutter_gallery__transition_perf_e2e_ios
-    recipe: devicelab/devicelab_drone
-    presubmit: false
-    timeout: 60
-    properties:
-      tags: >
-        ["devicelab","ios","mac"]
-      task_name: flutter_gallery__transition_perf_e2e_ios
-    scheduler: luci
-
   - name: Mac_ios flutter_gallery_ios__compile
     recipe: devicelab/devicelab_drone
     presubmit: false
@@ -2952,26 +2942,6 @@ targets:
       task_name: flutter_gallery_ios__start_up
     scheduler: luci
 
-  - name: Mac_ios flutter_gallery_ios__transition_perf
-    recipe: devicelab/devicelab_drone
-    presubmit: false
-    timeout: 60
-    properties:
-      tags: >
-        ["devicelab","ios","mac"]
-      task_name: flutter_gallery_ios__transition_perf
-    scheduler: luci
-
-  - name: Mac_ios flutter_gallery_ios_sksl_warmup__transition_perf
-    recipe: devicelab/devicelab_drone
-    presubmit: false
-    timeout: 60
-    properties:
-      tags: >
-        ["devicelab","ios","mac"]
-      task_name: flutter_gallery_ios_sksl_warmup__transition_perf
-    scheduler: luci
-
   - name: Mac_ios flutter_view_ios__start_up
     recipe: devicelab/devicelab_drone
     presubmit: false