remove unused template

edx_proctoring/templates/proctoring/rerun_practice_attempt.html

-{% load i18n %}
-
-
-
-<p>{% blocktrans %}   You can also <a class="start-timed-exam" data-ajax-url="{{enter_exam_endpoint}}" data-exam-id="{{exam_id}}" data-attempt-proctored=true data-start-immediately=false>retake the exam</a>.  {% endblocktrans %}</p>
-<button type="button" name="submit-proctored-exam" class="start-timed-exam" data-ajax-url="{{enter_exam_endpoint}}" data-exam-id="{{exam_id}}" data-attempt-proctored=true data-start-immediately=false >
-    {% blocktrans %}
-      Re-run the Exam
-    {% endblocktrans %}
-</button>
-