Fix regression in models.py caused by bad merge

Author: rhunwicks

database_files/models.py

@@ -72,7 +72,6 @@ def content_hash(self):
             self._content_hash = utils.get_text_hash(self.content)
         return self._content_hash
 
-    @classmethod
     def dump(self, check_hash=False):
         """
         Writes the file content to the filesystem.