Removed un-used database fixture

treeherder/model/fixtures/visibility_profile.json

@@ -1,18 +0,0 @@
-[
-    {
-        "pk": 1,
-        "model": "model.visibilityprofile",
-        "fields": {
-            "default": true,
-
-        }
-    },
-    {
-        "pk": 2,
-        "model": "djcelery.intervalschedule",
-        "fields": {
-            "every": 1,
-            "period": "minutes"
-        }
-    }
-]