Merge pull request #1517 from edx/christina/delete-unused

cms/templates/widgets/captions.html

cms/templates/widgets/import-course.html

cms/templates/widgets/module-dropdown.html

cms/templates/widgets/new-module.html

cms/templates/widgets/notes.html

cms/templates/widgets/save-captions.html

cms/templates/widgets/speed-tooltip.html

cms/templates/widgets/video-box-unused.html

cms/templates/widgets/video-box.html

cms/templates/widgets/video-edit.html

cms/templates/widgets/video-new.html