refactor: remove setDefaultController() method

The constructor of the Router class already defines the default controller.

system/Router/Router.php

@@ -15,7 +15,6 @@
 use CodeIgniter\Exceptions\PageNotFoundException;
 use CodeIgniter\HTTP\Request;
 use CodeIgniter\Router\Exceptions\RedirectException;
-use CodeIgniter\Router\Exceptions\RouterException;
 
 /**
  * Request router.
@@ -459,15 +458,12 @@ public function autoRoute(string $uri)
  {
  $segments = explode('/', $uri);
 
+ // WARNING: Directories get shifted out of the segments array.
  $segments = $this->scanControllers($segments);
 
- // If we don't have any segments left - try the default controller;
- // WARNING: Directories get shifted out of the segments array.
- if (empty($segments)) {
- $this->setDefaultController();
- }
+ // If we don't have any segments left - use the default controller;
  // If not empty, then the first segment should be the controller
- else {
+ if (! empty($segments)) {
  $this->controller = ucfirst(array_shift($segments));
  }
 
@@ -643,8 +639,6 @@ protected function setRequest(array $segments = [])
  {
  // If we don't have any segments - try the default controller;
  if (empty($segments)) {
- $this->setDefaultController();
-
  return;
  }
 
@@ -662,24 +656,4 @@ protected function setRequest(array $segments = [])
 
  $this->params = $segments;
  }
-
- /**
- * Sets the default controller based on the info set in the RouteCollection.
- */
- protected function setDefaultController()
- {
- if (empty($this->controller)) {
- throw RouterException::forMissingDefaultRoute();
- }
-
- sscanf($this->controller, '%[^/]/%s', $class, $this->method);
-
- if (! is_file(APPPATH . 'Controllers/' . $this->directory . ucfirst($class) . '.php')) {
- return;
- }
-
- $this->controller = ucfirst($class);
-
- log_message('info', 'Used the default controller.');
- }
 }