Refactor dynamic App::getLogger() to static DI::logger()

src/Module/Filer/RemoveTag.php

@@ -20,7 +20,7 @@ class RemoveTag extends BaseModule
 		}
 
 		$app = DI::app();
-		$logger = $app->getLogger();
+		$logger = DI::logger();
 
 		$item_id = (($app->argc > 1) ? intval($app->argv[1]) : 0);
 

src/Module/Filer/SaveTag.php

@@ -26,7 +26,7 @@ class SaveTag extends BaseModule
 	public static function rawContent(array $parameters = [])
 	{
 		$a = DI::app();
-		$logger = $a->getLogger();
+		$logger = DI::logger();
 
 		$term = XML::unescape(trim($_GET['term'] ?? ''));
 		// @TODO: Replace with parameter from router