Rival Delete functionality

titles/ongeki/frontend/js/rival_scripts.js

@@ -0,0 +1,12 @@
+function deleteRival(rivalUserId){
+
+    $(document).ready(function () {
+        $.post("/game/ongeki/rival.delete",
+        {
+            rivalUserId
+        },
+        function(data,status){
+            window.location.replace("/game/ongeki/")
+        })
+    });
+}