make sure the workspace is clean before job runs

azure-pipelines-woa.yml

@@ -1,3 +1,6 @@
+workspace:
+  clean: all
+
 steps:
 - checkout: self
   path: src\electron
@@ -123,6 +126,5 @@ steps:
 
 - powershell: |
     Remove-Item -path $env:APPDATA/Electron* -Recurse -Force -ErrorAction Ignore
-    Remove-Item -path $(Pipeline.Workspace)\src -Recurse -Force -ErrorAction Ignore
   displayName: 'Delete user app data directories'
   condition: always()