SIENTIAPDE-1314

Refactor model cache deletion in MLFlowRepository

- Updated the model cache deletion logic to remove the entire 'target' key instead of just the 'model' subkey, streamlining the cache management process.

laborious/utils/repository/model_repository.py

@@ -441,7 +441,7 @@ class MLFlowRepository:
         """
         self.logger.debug(f'Model {model_name} is outdated, downloading a new one')
 
-        del self.model_cache[model_key]['target']['model']
+        del self.model_cache[model_key]['target']
         del self.model_cache[model_key]
 
     def get_model(self, model_name: str, retention: int, model_type: str, flavor: str) -> Any: