Merge branch '463100-aqualls-remove-template-docs' into 'master'

Remove the MR template feature

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/160280



Merged-by: Phillip Wells <pwells@gitlab.com>
Approved-by: Phillip Wells <pwells@gitlab.com>
Co-authored-by: Amy Qualls <aqualls@gitlab.com>