Remove mac/ios agents and remove flaky flag from mac/ios on LUCI. (#76576)

Bug: https://github.com/flutter/flutter/issues/73392

dev/devicelab/manifest.yaml

@@ -36,13 +36,6 @@
 tasks:
   # Tests of compiling in a variety of modes
 
-  complex_layout_ios__compile:
-    description: >
-      Collects various performance metrics of compiling the Complex
-      Layout sample app for iOS from Mac.
-    stage: devicelab_ios
-    required_agent_capabilities: ["mac/ios"]
-
   complex_layout_win__compile:
     description: >
       Collects various performance metrics of compiling the Complex
@@ -50,13 +43,6 @@ tasks:
     stage: devicelab_win
     required_agent_capabilities: ["windows/android"]
 
-  basic_material_app_ios__compile:
-    description: >
-      Collects various performance metrics of compiling the default
-      app for iOS from Mac.
-    stage: devicelab_ios
-    required_agent_capabilities: ["mac/ios"]
-
   basic_material_app_win__compile:
     description: >
       Collects various performance metrics of compiling the default
@@ -64,13 +50,6 @@ tasks:
     stage: devicelab_win
     required_agent_capabilities: ["windows/android"]
 
-  flutter_gallery_ios__compile:
-    description: >
-      Collects various performance metrics of compiling the Flutter
-      Gallery for iOS from Mac.
-    stage: devicelab_ios
-    required_agent_capabilities: ["mac/ios"]
-
   flutter_gallery_win__compile:
     description: >
       Collects various performance metrics of compiling the Flutter
@@ -100,49 +79,18 @@ tasks:
     stage: devicelab_ios
     required_agent_capabilities: ["mac/ios"]
 
-  ios_content_validation_test:
-    description: >
-      Builds an obfuscated app and verifies contents and structure
-    stage: devicelab_ios
-    required_agent_capabilities: ["mac/ios"]
-    on_luci: true
-
   tiles_scroll_perf_ios__timeline_summary:
     description: >
       Measures the runtime performance of the tiles tab in the Complex Layout sample app on iPhone 6.
     stage: devicelab_ios
     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.
-    stage: devicelab_ios
-    required_agent_capabilities: ["mac/ios"]
-
   flutter_gallery_ios32__start_up:
     description: >
       Measures the startup time of the Flutter Gallery app on 32-bit iOS (iPhone 4S).
     stage: devicelab_ios
     required_agent_capabilities: ["mac/ios32"]
 
-  flavors_test_ios:
-    description: >
-      Checks that flavored builds work on iPhone 6.
-    stage: devicelab_ios
-    required_agent_capabilities: ["mac/ios"]
-
-  external_ui_integration_test_ios:
-    description: >
-      Checks that external UIs work on iPhone 6.
-    stage: devicelab_ios
-    required_agent_capabilities: ["mac/ios"]
-
-  channels_integration_test_ios:
-    description: >
-      Checks that platform channels work on iPhone 6.
-    stage: devicelab_ios
-    required_agent_capabilities: ["mac/ios"]
-
   platform_interaction_test_ios:
     description: >
       Checks platform interaction on iPhone 6.
@@ -167,37 +115,18 @@ tasks:
     stage: devicelab_ios
     required_agent_capabilities: ["mac/ios"]
 
-  backdrop_filter_perf_ios__timeline_summary:
-    description: >
-      Measures the runtime performance of backdrop filter blurs on iOS.
-    stage: devicelab_ios
-    required_agent_capabilities: ["mac/ios"]
-
   post_backdrop_filter_perf_ios__timeline_summary:
     description: >
       Measures the runtime performance of animations after a backdrop filter is removed on iOS.
     stage: devicelab_ios
     required_agent_capabilities: ["mac/ios"]
 
-  complex_layout_scroll_perf_ios__timeline_summary:
-    description: >
-      Measures the runtime performance of the Complex Layout sample app on
-      iOS.
-    stage: devicelab_ios
-    required_agent_capabilities: ["mac/ios"]
-
   flutter_gallery_ios__start_up:
     description: >
       Measures the startup time of the Flutter Gallery app on iPhone 6.
     stage: devicelab_ios
     required_agent_capabilities: ["mac/ios"]
 
-  complex_layout_ios__start_up:
-    description: >
-      Measures the startup time of the Complex Layout sample app on iPhone 6.
-    stage: devicelab_ios
-    required_agent_capabilities: ["mac/ios"]
-
   flutter_gallery_ios__transition_perf:
     description: >
       Measures the performance of screen transitions in Flutter Gallery on

dev/prod_builders.json

@@ -796,49 +796,49 @@
       "name": "Mac_ios backdrop_filter_perf_ios__timeline_summary",
       "repo": "flutter",
       "task_name": "mac_ios_backdrop_filter_perf_ios__timeline_summary",
-      "flaky": true
+      "flaky": false
     },
     {
       "name": "Mac_ios basic_material_app_ios__compile",
       "repo": "flutter",
       "task_name": "mac_ios_basic_material_app_ios__compile",
-      "flaky": true
+      "flaky": false
     },
     {
       "name": "Mac_ios channels_integration_test_ios",
       "repo": "flutter",
       "task_name": "mac_ios_channels_integration_test_ios",
-      "flaky": true
+      "flaky": false
     },
     {
       "name": "Mac_ios complex_layout_ios__compile",
       "repo": "flutter",
       "task_name": "mac_ios_complex_layout_ios__compile",
-      "flaky": true
+      "flaky": false
     },
     {
       "name": "Mac_ios complex_layout_ios__start_up",
       "repo": "flutter",
       "task_name": "mac_ios_complex_layout_ios__start_up",
-      "flaky": true
+      "flaky": false
     },
     {
       "name": "Mac_ios complex_layout_scroll_perf_ios__timeline_summary",
       "repo": "flutter",
       "task_name": "mac_ios_complex_layout_scroll_perf_ios__timeline_summary",
-      "flaky": true
+      "flaky": false
     },
     {
       "name": "Mac_ios external_ui_integration_test_ios",
       "repo": "flutter",
       "task_name": "mac_ios_external_ui_integration_test_ios",
-      "flaky": true
+      "flaky": false
     },
     {
       "name": "Mac_ios flavors_test_ios",
       "repo": "flutter",
       "task_name": "mac_ios_flavors_test_ios",
-      "flaky": true
+      "flaky": false
     },
     {
       "name": "Mac_ios flutter_gallery__transition_perf_e2e_ios",
@@ -850,7 +850,7 @@
       "name": "Mac_ios flutter_gallery_ios__compile",
       "repo": "flutter",
       "task_name": "mac_ios_flutter_gallery_ios__compile",
-      "flaky": true
+      "flaky": false
     },
     {
       "name": "Mac_ios flutter_gallery_ios__start_up",
@@ -916,7 +916,7 @@
       "name": "Mac_ios ios_content_validation_test",
       "repo": "flutter",
       "task_name": "mac_ios_ios_content_validation_test",
-      "flaky": true
+      "flaky": false
     },
     {
       "name": "Mac_ios ios_defines_test",
@@ -982,7 +982,7 @@
       "name": "Mac_ios platform_views_scroll_perf_ios__timeline_summary",
       "repo": "flutter",
       "task_name": "mac_ios_platform_views_scroll_perf_ios__timeline_summary",
-      "flaky": true
+      "flaky": false
     },
     {
       "name": "Mac_ios post_backdrop_filter_perf_ios__timeline_summary",