clean up pep8

openlp/core/common/__init__.py

@@ -482,16 +482,3 @@ def get_file_encoding(filename):
         return detector.result
     except OSError:
         log.exception('Error detecting file encoding')
-
-
-def json_default(obj):
-    """
-    Function to help save objects as JSON
-        
-    :param obj: object 
-    :return: the object dictionary
-    """
-    try:
-        return obj.__dict__
-    except:
-        raise TypeError("Unserializable object {} of type {}".format(obj, type(obj)))