Remove mac_x64

Author: jmagman

.ci.yaml

@@ -100,19 +100,6 @@ platform_properties:
         {
           "sdk_version": "17a5285i"
         }
-  mac_x64:
-    properties:
-      dependencies: >-
-        [
-          {"dependency": "ruby", "version": "ruby_3.1-pod_1.13"}
-        ]
-      os: Mac-15
-      device_type: none
-      cpu: x86
-      $flutter/osx_sdk : >-
-        {
-          "sdk_version": "17a5285i"
-        }
 
 targets:
   - name: Linux repo_checks
@@ -1039,33 +1026,6 @@ targets:
       target_file: macos_repo_checks.yaml
 
   ### macOS desktop tasks ###
-  # macos-platform_tests builds all the packages on ARM, so this build is run
-  # on Intel to give us build coverage of both host types.
-  - name: Mac_x64 build_all_packages master
-    recipe: packages/packages
-    timeout: 30
-    properties:
-      version_file: flutter_master.version
-      target_file: macos_build_all_packages.yaml
-      channel: master
-      env_variables: >-
-        {
-          "CHANNEL": "master"
-        }
-
-  - name: Mac_x64 build_all_packages stable
-    recipe: packages/packages
-    timeout: 30
-    properties:
-      add_recipes_cq: "true"
-      version_file: flutter_stable.version
-      target_file: macos_build_all_packages.yaml
-      channel: stable
-      env_variables: >-
-        {
-          "CHANNEL": "stable"
-        }
-
   # TODO(stuartmorgan): Remove "- packages" from all task names once
   # flutter/plugins is merged into this repo and turned down; it's here only
   # because names must be unique across all flutter repositories.
@@ -1119,32 +1079,6 @@ targets:
         }
 
   ### iOS tasks ###
-  # ios_platform_tests builds all the packages on ARM, so this build is run
-  # on Intel to give us build coverage of both host types.
-  - name: Mac_x64 ios_build_all_packages master
-    recipe: packages/packages
-    timeout: 30
-    properties:
-      channel: master
-      version_file: flutter_master.version
-      target_file: ios_build_all_packages.yaml
-      env_variables: >-
-        {
-          "CHANNEL": "master"
-        }
-
-  - name: Mac_x64 ios_build_all_packages stable
-    recipe: packages/packages
-    timeout: 30
-    properties:
-      channel: stable
-      version_file: flutter_stable.version
-      target_file: ios_build_all_packages.yaml
-      env_variables: >-
-        {
-          "CHANNEL": "stable"
-        }
-
   - name: Mac_arm64 ios_platform_tests_shard_1 master
     recipe: packages/packages
     timeout: 60