GitLab

* lisp/window.el (special-display-regexps, special-display-frame-alist)
(special-display-buffer-names, special-display-function)
(display-buffer-reuse-frames): Mark as obsolete.

* lisp/progmodes/compile.el: Don't use display-buffer-reuse-frames.

* help.el (help-print-return-message): Don't treat
display-buffer-reuse-frames specially.