Revert "sudo: add example for interactive shell"

This reverts commit 415d4834eab0ec192a44dd8354d46d7df0f7ea8f.

pages/common/sudo.md

@@ -17,7 +17,3 @@
 - Repeat the last command as sudo:
 
 `sudo !!`
-
-- Run an interactive shell with superuser privileges
-
-`sudo -i`