fix: remove the code to return null

$this->move() never returns false, but throws exception

Author: kenjis

system/HTTP/Files/UploadedFile.php

@@ -376,8 +376,9 @@ public function store(string $folderName = null, string $fileName = null): strin
 		$fileName   = $fileName ?? $this->getRandomName();
 
 		// Move the uploaded file to a new location.
-		return ($this->move(WRITEPATH . 'uploads/' . $folderName, $fileName)) ?
-				$folderName . $this->name : null;
+		$this->move(WRITEPATH . 'uploads/' . $folderName, $fileName);
+
+		return $folderName . $this->name;
 	}
 
 	//--------------------------------------------------------------------