Fix return statement formatting in _deleteAllFiles

Author: Diksha-MukherjeeAgarwal

lib/view/logged_data_screen.dart

@@ -103,9 +103,8 @@ class _LoggedDataScreenState extends State<LoggedDataScreen> {
 
   Future<void> _deleteAllFiles() async {
     if (_isLoading) {
-      return; 
+       return; 
     }
-    
     if (_files.isEmpty) {
       ScaffoldMessenger.of(context).showSnackBar(
         SnackBar(