Fix message wording.

TNL-3773

openassessment/xblock/staff_area_mixin.py

@@ -377,8 +377,8 @@ class StaffAreaMixin(object):
                 "success": True,
                 'msg': self._(
                     u"The learner submission has been removed from peer assessment. "
-                    u"The learner receives a grade of zero unless you reset "
-                    u"the learner's attempts for the problem to allow them to "
+                    u"The learner receives a grade of zero unless you delete "
+                    u"the learner's state for the problem to allow them to "
                     u"resubmit a response."
                 )
             }