How to remove 'Main Menu' from my mobile view (using Superfish)?
Go to admin/structure/block and look for Main Menu (should be in the Superfish region).

Click configure and set the title to not display. As the instructions for the Block title field say:


  Override the default title for the block. Use &lt;none&gt; to display no title, or leave blank to use the default block title. This field supports tokens.