(notmuch-call-notmuch-process "tag" (concat "-" tag) (notmuch-search-find-thread-id))
(notmuch-search-set-tags (delete tag (notmuch-search-get-tags))))
(notmuch-call-notmuch-process "tag" (concat "-" tag) (notmuch-search-find-thread-id))
(notmuch-search-set-tags (delete tag (notmuch-search-get-tags))))