remove quizzes next flag from course template
remove quizzes next flag from course template

fixes FOO-2023

apparently it means "convert classic quizzes to quizzes.net", not
"make sure to also import quizzes.next quizzes with this course import"

Change-Id: I96b9d61d3703a40167d81fd83063ed3dba11cb5c
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/266590
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: Jacob Burroughs <8ecea6e385af5cf9f53123f5ca17fb5fd6a6d4b2@instructure.com>
QA-Review: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
Product-Review: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>

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