remove var in c code that isn't used.

theano/tensor/elemwise_cgen.py

@@ -12,7 +12,6 @@ def make_declare(loop_orders, dtypes, sub):
         # and an integer for the number of dimensions
         decl += """
         %(dtype)s* %(var)s_iter;
-        int %(var)s_nd;
         """ % locals()
         for j, value in enumerate(loop_order):
             if value != 'x':