Remove openhub and model apps

Author: kvgarg

.moban.yaml

@@ -11,7 +11,6 @@ packages:
   - gamification
   - ci_build
   - meta_review
-  - model
   - twitter
   - unassigned_issues
 

.nocover.yaml

@@ -10,7 +10,6 @@ nocover_file_globs:
   - gsoc/*.py
   - ci_build/*.py
   - meta_review/handler.py
-  - model/*.py
   - openhub/*.py
   - twitter/*.py
   # Optional coverage. Once off scripts.