minor #8043 Remove debugging class cache and bootstrap section (fbourigault)

This PR was merged into the master branch.

Discussion
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Remove debugging class cache and bootstrap section

This remove the no-longer required debugging section about bootstrap file and class cache.

Commits
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49e24b9 remove debugging class cache and bootstrap section

Author: xabbuh

debug/debugging.rst

@@ -14,53 +14,6 @@ configuration is optimized for two main purposes:
 * Be as similar as possible as the production environment to avoid problems
   when deploying the project.
 
-Disabling the Bootstrap File and Class Caching
-----------------------------------------------
-
-And to make the production environment as fast as possible, Symfony creates
-big PHP files in your cache containing the aggregation of PHP classes your
-project needs for every request. However, this behavior can confuse your debugger,
-because the same class can be located in two different places: the original class
-file and the big file which aggregates lots of classes.
-
-This recipe shows you how you can tweak this caching mechanism to make it friendlier
-when you need to debug code that involves Symfony classes.
-
-The ``app_dev.php`` front controller reads as follows by default::
-
-    // ...
-
-    $loader = require __DIR__.'/../app/autoload.php';
-    Debug::enable();
-
-    $kernel = new AppKernel('dev', true);
-    $kernel->loadClassCache();
-    $request = Request::createFromGlobals();
-    // ...
-
-To make your debugger happier, disable the loading of all PHP class caches
-by removing the call to ``loadClassCache()``::
-
-    // ...
-
-    $loader = require_once __DIR__.'/../app/autoload.php';
-    Debug::enable();
-
-    $kernel = new AppKernel('dev', true);
-    // $kernel->loadClassCache();
-    $request = Request::createFromGlobals();
-
-.. tip::
-
-    If you disable the PHP caches, don't forget to revert after your debugging
-    session.
-
-Some IDEs do not like the fact that some classes are stored in different
-locations. To avoid problems, you can either tell your IDE to ignore the PHP
-cache files, or you can change the extension used by Symfony for these files::
-
-    $kernel->loadClassCache('classes', '.php.cache');
-
 Useful Debugging Commands
 -------------------------