Remove the ref equality check in the Eq Array instance

See discussion here: 3b0d306

Author: LiamGoodacre

src/Data/Eq.js

@@ -9,7 +9,6 @@ exports.refEq = function (r1) {
 exports.eqArrayImpl = function (f) {
   return function (xs) {
     return function (ys) {
-      if (xs === ys) return true;
       if (xs.length !== ys.length) return false;
       for (var i = 0; i < xs.length; i++) {
         if (!f(xs[i])(ys[i])) return false;