Remove misleading description.

[Kellegram]

Based on the repo description, this will not be a GUI application and should therefore not be called a ShareX clone, as it's not in any way shape or form similar to it or a clone of it. ShareX is a GUI application and big part of its strength is the great and feature-full graphical UI. The current description gives people false hope and the mention of ShareX is out of place and in my opinion it should be removed.