feat: add solution of Remove Element(027) with javascript

Author: taryn2016

src/_027/Solution.js

@@ -0,0 +1,15 @@
+/**
+ * @param {number[]} nums
+ * @param {number} val
+ * @return {number}
+ */
+var removeElement = function(nums, val) {
+    var len = nums.length
+    for(var i = 0; i < len; i++) {
+        if (nums[i] === val) {
+            nums.splice(i, 1)
+            i = i - 1
+        }
+    }
+    return nums.length
+};