Falback to original exception rendering

Different method signature on 2.8 and 3.0 makes overriding this tricky,
and I am unsure of the benefits anyway.

Author: dantleech

src/PHPCR/Shell/Console/Application/ShellApplication.php

@@ -267,16 +267,6 @@ protected function getDefaultCommand()
         return 'shell:path:show';
     }
 
-    /**
-     * Render an exception to the console
-     *
-     * {@inheritDoc}
-     */
-    public function renderException(\Exception $exception, OutputInterface $output)
-    {
-        $output->writeln(sprintf('<exception>%s</exception>', $exception->getMessage()));
-    }
-
     /**
      * Wrap the add method and do not register commands which are unsupported by
      * the current transport.