do I need to delete a menu like I do?
Can you further explain what you mean?
Como excluir o menu “plataforma” do painel ?
Clic here: Widgets: Develop - Piwik Analytics - Developer Docs - v3 and go to “Removing widgets and content from reporting pages”
goto administer -> menu
click on your menu link
click on the edit menu tab at the top
click the delete button at the bottom
confirm menu deletion on next screen