Fix route path in phar (#1624)

Don't call realpath() on route file path, it breaks routes inside phars.
Also, it doesn't match the configPath above it.  I can't figure out why realpath() would be called here.

src/ServiceProvider.php

@@ -104,7 +104,7 @@ public function boot()
         $configPath = __DIR__ . '/../config/debugbar.php';
         $this->publishes([$configPath => $this->getConfigPath()], 'config');
 
-        $this->loadRoutesFrom(realpath(__DIR__ . '/debugbar-routes.php'));
+        $this->loadRoutesFrom(__DIR__ . '/debugbar-routes.php');
 
         $this->registerMiddleware(InjectDebugbar::class);