Removes a copy and paste leftover in the element-admin doc (#4622)

docs/configuring-playbook-element-admin.md

@@ -65,7 +65,3 @@ ansible-playbook -i inventory/hosts setup.yml --tags=setup-all,start
 The shortcut commands with the [`just` program](just.md) are also available: `just install-all` or `just setup-all`
 
 `just install-all` is useful for maintaining your setup quickly ([2x-5x faster](../CHANGELOG.md#2x-5x-performance-improvements-in-playbook-runtime) than `just setup-all`) when its components remain unchanged. If you adjust your `vars.yml` to remove other components, you'd need to run `just setup-all`, or these components will still remain installed. Note these shortcuts run the `ensure-matrix-users-created` tag too.
-
-## Usage
-
-Once installed, Element Call integrates seamlessly with Matrix clients like [Element Web](configuring-playbook-client-element-web.md) and Element X on mobile (iOS and Android).