Merge branch '450915-remove-flag' into 'master'

Remove ai_prompt_current_page_skip_reader flag

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/149970



Merged-by: Doug Stull <dstull@gitlab.com>
Approved-by: Dillon Wheeler <dwheeler@gitlab.com>
Approved-by: Doug Stull <dstull@gitlab.com>
Reviewed-by: Dillon Wheeler <dwheeler@gitlab.com>
Co-authored-by: Mark Chao <mchao@gitlab.com>