[Matlab] Remove broken rxnEqs function

"ReactionEqn" is the working alternative. See Issue 118.

interfaces/matlab/toolbox/@Kinetics/rxnEqs.m

@@ -1,25 +0,0 @@
-function e = rxnEqs(a, irxn)
-% rxnEqs
-%
-if nargin == 1
-    m = nReactions(a);
-    n = 1;
-    irxn = (1:m)';
-elseif nargin == 2
-    if isa(irxn,'double')
-        [m, n] = size(irxn);
-    else
-        error('reaction number(s) must be numeric');
-    end
-end
-
-if m == 1 && n == 1
-    e = rxnstring(a.id, irxn);
-else
-    e = cell(m,n);
-    for i = 1:m
-        for j = 1:n
-            e{i,j} = rxnstring(a.id, irxn(i,j));
-        end
-    end
-end