Tweak reference documents

Author: javiereguiluz

reference/configuration/debug.rst

@@ -27,9 +27,6 @@ key in your application configuration.
     namespace and the related XSD schema is available at:
     ``https://symfony.com/schema/dic/debug/debug-1.0.xsd``
 
-Configuration
--------------
-
 max_items
 ~~~~~~~~~
 

reference/configuration/framework.rst

@@ -19,9 +19,6 @@ configured under the ``framework`` key in your application configuration.
     namespace and the related XSD schema is available at:
     ``https://symfony.com/schema/dic/symfony/symfony-1.0.xsd``
 
-Configuration
--------------
-
 .. _configuration-framework-secret:
 
 secret

reference/configuration/security.rst

@@ -19,9 +19,6 @@ key in your application configuration.
     namespace and the related XSD schema is available at:
     ``https://symfony.com/schema/dic/services/services-1.0.xsd``
 
-Configuration
--------------
-
 **Basic Options**:
 
 * `access_denied_url`_

reference/configuration/twig.rst

@@ -19,9 +19,6 @@ under the ``twig`` key in your application configuration.
     namespace and the related XSD schema is available at:
     ``https://symfony.com/schema/dic/twig/twig-1.0.xsd``
 
-Configuration
--------------
-
 auto_reload
 ~~~~~~~~~~~
 

reference/configuration/web_profiler.rst

@@ -24,9 +24,6 @@ under the ``web_profiler`` key in your application configuration.
 
     The web debug toolbar is not available for responses of type ``StreamedResponse``.
 
-Configuration
--------------
-
 excluded_ajax_paths
 ~~~~~~~~~~~~~~~~~~~