I just want to remove some of the elements from the menu below. The question is - how?

I just want to remove some of the elements from the menu below. The question is - how?

See this question. There is a guide there using the "Customize perspective" option in the menu which may work. A comment indicates that it doesnt, but its worth trying out.
But if you have a context menu that is too full, it may be a warning that you are using to many plugins in the same perspective. Unfortunately too often plugins have a tendency to add themselves a little all over the place.