Revert "Update azure-pipelines.yml for Azure Pipelines"

This reverts commit 23da755f07.

scripts/azure-pipelines.yml

@@ -15,16 +15,16 @@ parameters:
     default: 0
   - name: VM_IMAGE_WINDOWS
     type: string
-    default: '$(BuildAgent.Pool.Windows)'
+    default: 'Azure-Pipelines-windows-2022'
   - name: VM_IMAGE_WINDOWS_NATIVE
     type: string
-    default: '$(BuildAgent.Pool.Windows.Native)'
+    default: 'Azure-Pipelines-windows-2019'
   - name: VM_IMAGE_MAC
     type: string
-    default: '$(BuildAgent.Pool.macOS)'
+    default: 'Azure-Pipelines-macOS-10.15'
   - name: VM_IMAGE_LINUX
     type: string
-    default: '$(BuildAgent.Pool.Linux)'
+    default: 'Azure-Pipelines-ubuntu-18.04'
 
 variables:
   SKIASHARP_VERSION: 2.88.0