How to remove redundant elements in a sparse matrix?

I have the following Sparse Matrix E with the following redundant elements i.e (2,1) = (1,2), (5,1) = (1,5), (2,3)=(3,2) and (2,4) = (4,2)

E = 
(2,1)  2.33
(5,1)  4.16
(1,2)  2.33
(3,2)  2.08
(4,2)  4.33
(1,5)  4.16
(2,3)  2.08
(2,4)  4.33

I want my sparse matrix output to be as follows

E =
(1,2)  2.33
(1,5)  4.16
(2,3)  2.08
(2,4)  4.33

Answer 1

[Bruno Luong]

E = triu(E);

[Souarv De]

@Bruno Luong It's gives the result correct but not in the ascending order sequence. Can you do any further modification in it.