Revert "improvement: allow custom workflow branch name prefix (#1494)"

This reverts commit da0f520f0d4f7af0e0ec8af16fbdd04bc39751b4.

website/content/docs/beta-features.md

@@ -120,28 +120,3 @@ Template tags produce the following output:
 - `{{collection}}`: the name of the collection containing the entry changed
 
 - `{{path}}`: the full path to the file changed
-
-## Custom Editorial Workflow branch name prefixes
-
-When using [editorial workflow](), a branch is created for each entry. By default the branch name
-follows this template:
-
-```
-cms/{{slug}}
-```
-
-You can customize the `cms` portion by setting `workflow_branch_prefix` under `backend` in your
-`config.yml`:
-
-```yaml
-backend:
-  name: some-backend
-  branch: dev
-  workflow_branch_prefix: cms-dev
-```
-
-The above configuration would change the branch name template to:
-
-```
-cms-dev/{{slug}}
-```