Remove unimplemented grade_summary feature.
Merge pull request #5290 from mitocw/bdero/fix-grade-summary-opaque-keys

Remove unimplemented legacy dashboard grade_summary feature
Converted annotation lettuce test into bok-choy test.
TNL-353
Merge pull request #5404 from edx/waheed/tnl353-wrote-annotation-bok-choy-test

Converted annotation lettuce test into bok-choy test.