Merge branch '6.2' into 6.3

* 6.2:
  [DependencyInjection] Remove not implemented behavior

Author: javiereguiluz

service_container/service_subscribers_locators.rst

@@ -417,13 +417,6 @@ other services. To do so, create a new service definition using the
                 # add the following tag to the service definition:
                 # tags: ['container.service_locator']
 
-            # if the element has no key, the ID of the original service is used
-            app.another_command_handler_locator:
-                class: Symfony\Component\DependencyInjection\ServiceLocator
-                arguments:
-                    -
-                        - '@app.command_handler.baz'
-
     .. code-block:: xml
 
         <!-- config/services.xml -->
@@ -438,8 +431,6 @@ other services. To do so, create a new service definition using the
                     <argument type="collection">
                         <argument key="App\FooCommand" type="service" id="app.command_handler.foo"/>
                         <argument key="App\BarCommand" type="service" id="app.command_handler.bar"/>
-                        <!-- if the element has no key, the ID of the original service is used -->
-                        <argument type="service" id="app.command_handler.baz"/>
                     </argument>
                     <!--
                         if you are not using the default service autoconfiguration,
@@ -470,13 +461,6 @@ other services. To do so, create a new service definition using the
                 // add the following tag to the service definition:
                 // ->tag('container.service_locator')
             ;
-
-            // if the element has no key, the ID of the original service is used
-            $services->set('app.another_command_handler_locator', ServiceLocator::class)
-                ->args([[
-                    service('app.command_handler.baz'),
-                ]])
-            ;
         };
 
 .. note::