This oughtta do it:
function C2 = examplecelluniqueage
C = {[1 1 1; 1 7 8; 8 7 1];rand(4,9);magic(2);ones(10)}; %example cell
C2 = cellfun(@removeDups,C,'uni',false); %apply dup remover
function y = removeDups(x)
[uv,~,idxu] = unique(sort(x,2),'rows'); %unique rows of sorted rows
[n,idxh] = histc(idxu,1:numel(uv)); %how many occurences of each row?
idxk = idxu(n(idxh)==1); %keep the ones that occured once
y = x(idxk,:); %extract
