minor #569 Removed the deprecated getName() method in Twig extensions (javiereguiluz)

This PR was merged into the master branch.

Discussion
----------

Removed the deprecated getName() method in Twig extensions

```
        /**
         * Returns the name of the extension.
         *
         * @return string The extension name
         *
         * @deprecated since 1.26 (to be removed in 2.0), not used anymore internally
         */
        function getName();
```

Commits
-------

b1da2d8 Removed the deprecated getName() method in Twig extensions

Author: javiereguiluz

src/AppBundle/Twig/AppExtension.php

@@ -95,14 +95,4 @@ public function getLocales()
 
         return $locales;
     }
-
-    /**
-     * {@inheritdoc}
-     */
-    public function getName()
-    {
-        // the name of the Twig extension must be unique in the application. Consider
-        // using 'app.extension' if you only have one Twig extension in your application.
-        return 'app.extension';
-    }
 }

src/CodeExplorerBundle/Twig/SourceCodeExtension.php

@@ -132,10 +132,4 @@ private function unindentCode($code)
 
         return $formattedCode;
     }
-
-    // the name of the Twig extension must be unique in the application
-    public function getName()
-    {
-        return 'code_explorer_source_code';
-    }
 }