Revert "Expand fast case of parseInt to include radix == 10 and radix == 0."

Causes Mozilla failures.

TBR=sandholm@chromium.org

Review URL: http://codereview.chromium.org/6542056

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6880 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/v8natives.js

@@ -92,7 +92,7 @@ function GlobalIsFinite(number) {
 
 // ECMA-262 - 15.1.2.2
 function GlobalParseInt(string, radix) {
-  if (IS_UNDEFINED(radix) || radix === 10 || radix === 0) {
+  if (IS_UNDEFINED(radix)) {
     // Some people use parseInt instead of Math.floor.  This
     // optimization makes parseInt on a Smi 12 times faster (60ns
     // vs 800ns).  The following optimization makes parseInt on a