Remove unnecessary parameter from function (atlassian-api#920)

Parameter is not used by the function.

Author: jensvog

atlassian/jira.py

@@ -3680,7 +3680,7 @@ def tempo_teams_get_memberships_for_member(self, username):
     #   Agile(Formerly Greenhopper) REST API implements
     #   Resource: https://docs.atlassian.com/jira-software/REST/7.3.1/
     #######################################################################
-    def add_issues_to_backlog(self, sprint_id, issues):
+    def add_issues_to_backlog(self, issues):
         """
         Adding Issue(s) to Backlog
         :param issues:       list:  List of Issue Keys