spec: add tiny-mce remove link button check
spec: add tiny-mce remove link button check

Change-Id: Ibacf0e4e34848bab748cb9d9d83c28a51fe7ebce
Reviewed-on: https://gerrit.instructure.com/68299
Tested-by: Jenkins
Reviewed-by: Gentry Beckmann <f487939f789774cca922ca5b886632de73477ea0@instructure.com>
Product-Review: Jeremy Putnam <b030d6d6f199f844ec424882be473c2ab9adc93b@instructure.com>
QA-Review: Jeremy Putnam <b030d6d6f199f844ec424882be473c2ab9adc93b@instructure.com>

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