Removing duplicate package ID-2021-04-01-preview (#15090)

Author: msaranga

specification/databricks/resource-manager/readme.md

@@ -67,15 +67,6 @@ openapi-type: arm
 tag: package-2021-04-01-preview
 ```
 
-### Tag: package-2021-04-01-preview
-
-These settings apply only when `--tag=package-2021-04-01-preview` is specified on the command line.
-
-``` yaml $(tag) == 'package-2021-04-01-preview'
-input-file:
-- Microsoft.Databricks/preview/2021-04-01-preview/databricks.json
-```
-
 ### Tag: package-2018-04-01
 
 These settings apply only when `--tag=package-2018-04-01` is specified on the command line.