removed default value from content in save state to file funciton

src/simudator/core/module.py

@@ -116,7 +116,7 @@ class Module:
         """
         print(self.name)
 
-    def _helper_save_state_to_file(self, file_path: str, content="") -> bool:
+    def _helper_save_state_to_file(self, file_path: str, content: str) -> bool:
         """
         Tries to save the content to a given file.