minor #17793 [FrameworkBundle] Remove unused private method. (paradajozsef)

This PR was merged into the 2.8 branch.

Discussion
----------

[FrameworkBundle] Remove unused private method.

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Since 2.8, this method is not used in `TextDescriptor`.

Commits
-------

94bec9a [FrameworkBundle] Remove unused private method.

src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php

@@ -428,17 +428,6 @@ class TextDescriptor extends Descriptor
         return trim($configAsString);
     }
 
-    /**
-     * @param string $section
-     * @param string $message
-     *
-     * @return string
-     */
-    private function formatSection($section, $message)
-    {
-        return sprintf('<info>[%s]</info> %s', $section, $message);
-    }
-
     /**
      * @param callable $callable
      *