Emacs: Remove obsolete (26.*) config.

.emacs.d/lisp/main.el

@@ -151,7 +151,7 @@
 ;; REVIEW: If xdg-open is not found, set Emacs URL browser to the environment browser,
 ;; or w3m if BROWSER is not set.
 ;; See https://debbugs.gnu.org/cgi/bugreport.cgi?bug=18986.
-;; In Emacs 26, the BROWSER variable is still not checked.
+;; In Emacs 27, the BROWSER variable is still not checked.
 (require 'browse-url)
 (setq browse-url-generic-program (or
                                   (executable-find (or (getenv "BROWSER") ""))
@@ -184,12 +184,7 @@
                  (".ogv" . "video/ogg")
                  (".wmv" . "video/x-ms-wmv")
                  (".mkv" . "video/x-matroska")))
-    (add-to-list 'mailcap-mime-extensions ext))
-  (when (version<= "26.2" emacs-version)
-    (assoc-delete-all
-     "mpeg"
-     (alist-get "video" mailcap-mime-data
-                nil nil #'string-equal))))
+    (add-to-list 'mailcap-mime-extensions ext)))
 
 ;;; Default ispell dictionary. If not set, Emacs uses the current locale.
 (setq ispell-dictionary "english")
@@ -346,11 +341,6 @@
 ;;  edebug-test-coverage t
 ;;  edebug-trace t)
 
-;;; Make windowing more reactive on.  This is especially true with Helm on EXWM.
-;; TODO: Test if still a problem with Emacs 27.
-(when (= emacs-major-version 26)
-  (setq x-wait-for-event-timeout nil))
-
 (when (require 'so-long nil 'noerror)
   (global-so-long-mode 1))