Remove unused commands.

Close #142.

Author: seagle0128

README.md

@@ -97,19 +97,17 @@ Then start Emacs. Wait for a while to install packages at the first startup. Enj
 ### Update
 
 ``` emacs-lisp
-# Update Centaur Emacs (then restart), including configurations and packages
+# Update Centaur Emacs, including configurations and packages
 M-x centaur-update
-M-x centaur-update-and-restart
 
 # Update Emacs configurations only
 M-x centaur-update-config
 
 # Update ~/.dotfiles if it exists
 M-x centaur-update-dotfiles
 
-# Update packages only (then restart)
+# Update packages only
 M-x centaur-update-packages
-M-x centaur-update-packages-and-restart
 
 # Update all including configurations, packages and dotfiles
 M-x centaur-update-all