Remove unused exception

journals/exceptions.py

@@ -2,14 +2,6 @@ __copyright__ = "Copyright © Stichting SciPost (SciPost Foundation)"
 __license__ = "AGPL v3"
 
 
-class JournalNameError(Exception):
-    def __init__(self, name):
-        self.name = name
-
-    def __str__(self):
-        return self.name
-
-
 class PaperNumberError(Exception):
     def __init__(self, nr):
         self.nr = nr