minor #9468 Remove docs about service_name:method (Chris-Bitler)

This PR was merged into the master branch.

Discussion
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Remove docs about service_name:method

The 'service_name:method' syntax is deprecated as of 4.1

This fixes #9306.

Commits
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a5a5ad7 Remove docs about service_name:method

Author: javiereguiluz

controller/service.rst

@@ -19,9 +19,6 @@ If the service id is the fully-qualified class name (FQCN) of your controller,
 you're done! You can use the normal ``App\Controller\HelloController::index``
 syntax in your routing and it will find your service.
 
-But, if your service has a different id, you can use a special
-``service_id:method_name`` syntax:
-
 .. configuration-block::
 
     .. code-block:: php-annotations

routing.rst

@@ -534,8 +534,6 @@ Controller Naming Pattern
 -------------------------
 
 The ``controller`` value in your routes has a very simple format ``CONTROLLER_CLASS::METHOD``.
-If your controller is registered as a service, you can also use just one colon separator
-(e.g. ``service_name:index``).
 
 .. tip::