message: Remove gallery preview version 2020-09-30 from stable release
diff: @@ -219,8 +219,7 @@ input-file:
  - Microsoft.Compute/stable/2020-06-01/runCommands.json
  - Microsoft.Compute/stable/2019-04-01/skus.json
  - Microsoft.Compute/stable/2020-06-30/disk.json
  -- Microsoft.Compute/preview/2020-09-30/gallery.json
  -- Microsoft.Compute/preview/2020-09-30/sharedGallery.json
  +- Microsoft.Compute/stable/2019-12-01/gallery.json
  - Microsoft.ContainerService/stable/2017-01-31/containerService.json
  - Microsoft.Compute/preview/2020-10-01-preview/cloudService.json
  ```
  @@ -235,7 +234,6 @@ input-file:
  ```
  ### Tag: package-2020-09-30
  -
  These settings apply only when `--tag=package-2020-09-30` is specified on the command line.
  ``` yaml $(tag) == 'package-2020-09-30'
  