[$30] Remove the unnecessary options in the Preferences

[sdgun]

Steps
Go to vanilla forums
Click on profile avatar
Select Preferences

There are some unnecessary options that are not related to existing functionalities

[jmgasper]

Contest https://www.topcoder.com/challenges/30150884 has been created for this ticket.

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[jmgasper]

Contest https://www.topcoder.com/challenges/30150884 has been updated - it has been assigned to obog.

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[atelomycterus]

@jmgasper Please apply PR -#221. Thanks!

Added the param in config.php:

the options are hidden: