Revert of DevTools: Fix console.log for arrays in some corner cases.

Source/devtools/front_end/utilities.js

Index: Source/devtools/front_end/utilities.js
diff --git a/Source/devtools/front_end/utilities.js b/Source/devtools/front_end/utilities.js
index 77d610bc267b05f9f9d95e23f7fa9baedfd1f144..3fa72bf1c294b2e07b79556f32be90b74dc6f15c 100644
--- a/Source/devtools/front_end/utilities.js
+++ b/Source/devtools/front_end/utilities.js
@@ -287,18 +287,6 @@ String.naturalOrderComparator = function(a, b)
 }
 
 /**
- * @param {string} name
- * @param {number=} arrayLength
- * @return {boolean}
- */
-String.isArrayIndexPropertyName = function(name, arrayLength)
-{
-    // Array index check according to the ES5-15.4.
-    var index = name >>> 0;
-    return String(index) === name && index !== 0xffffffff && (typeof arrayLength === "undefined" || index < arrayLength);
-}
-
-/**
  * @param {number} num
  * @param {number} min
  * @param {number} max