[Feature flag] Cleanup invite_members_group_modal - remove import
What does this MR do and why?
clean up a few remaining items from invite member feature flag rollout
- date/user selector logic only used on old non modal invite form
- import/apply import items only used before
import project members
modal existed(was rolled out as part of this effort as well) - Update docs
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Related to #352526 (closed)
Edited by Doug Stull