Remove more unnecessary imports

lms/templates/dashboard/dashboard_course_listing.html

@@ -4,8 +4,6 @@
 <%!
   from django.core.urlresolvers import reverse
   from courseware.courses import course_image_url, get_course_about_section
-  from courseware.access import has_access
-  from certificates.models import CertificateStatuses
   import waffle
 %>
 <li class="course-item">