The Pages I'm Following is a Wikia feature that adds a list of pages a user is following to their user page.
How to disable itEdit
Hide the list on all user pages Edit
Add the following code to your wiki's Common.css
Disable the list for you on all Wikia Edit
You can make that list private for you on all wikis by setting an option in your Special:Preferences: Just enble the option Make my followed pages list private under Followed pages section.