Remove unused ol.array.flatten function

src/ol/array.js

@@ -124,22 +124,6 @@ ol.array.reverseSubArray = function(arr, begin, end) {
 };
 
 
-/**
- * @param {Array.<*>} arr Array.
- * @return {!Array.<?>} Flattened Array.
- */
-ol.array.flatten = function(arr) {
-  var data = arr.reduce(function(flattened, value) {
-    if (Array.isArray(value)) {
-      return flattened.concat(ol.array.flatten(value));
-    } else {
-      return flattened.concat(value);
-    }
-  }, []);
-  return data;
-};
-
-
 /**
  * @param {Array.<VALUE>} arr The array to modify.
  * @param {Array.<VALUE>|VALUE} data The elements or arrays of elements

test/spec/ol/array.test.js

@@ -427,16 +427,6 @@ describe('ol.array', function() {
     });
   });
 
-  describe('flatten', function() {
-    it('flattens different kinds of nested arrays', function() {
-      expect(ol.array.flatten([1, 2])).to.eql([1, 2]);
-      expect(ol.array.flatten([1, [2, [3, [4, 5]]]])).to.eql([1, 2, 3, 4, 5]);
-      expect(ol.array.flatten([[[[1], 2], 3], 4])).to.eql([1, 2, 3, 4]);
-      expect(ol.array.flatten([[1]])).to.eql([1]);
-      expect(ol.array.flatten([])).to.eql([]);
-    });
-  });
-
   describe('isSorted', function() {
     it('works with just an array as argument', function() {
       expect(ol.array.isSorted([1, 2, 3])).to.be(true);