API GuildControlDelRank

__NOTOC__
Deletes a guild rank.
 GuildControlDelRank(index)
==Parameters==
===Arguments===
:;index: - must be between 1 and the value returned by GuildControlGetNumRanks().
===Returns===
:;nil
If the rank cannot be deleted, a message written be sent to the default chat window.
==Details==
The index rank must be unused - no guildmembers may currently have that rank or any lower rank (having a higher index value).