Reformatted, added title bar, added description header, removed white space in examples. added colons to headers.

skills/mechanics/remove.md

-Mechanic: Remove
 ================
 
+## Description:
 Removes the targeted entity from existence. Does not work on players.
 
-Examples
---------
+## Examples:
 
 This mob would despawn 10 seconds after spawning:
 ```yaml