omit nonzero elemnt in cell

A={[3,4],[8,9],[1,2],0,0,0};
A(cell2mat(A)==0)={[]};

I used this code, but have error

Error using cat
Dimensions of arrays being concatenated are not consistent.

Error in cell2mat (line 2)
            m{n} = cat(2,c{n,:});

Result should be

            A={[3,4],[8,9],[1,2],[],[],[]};

Answer 1

[Andrei Bobrov]

A(cellfun(@(x)numel(x) == 1 && x == 0,A)) = {[]};

Answer 2

[Himanshu tripathi]

This may be helpful.

Replacing Values of a cell in Matlab.