Remove deprecated "i::" prefix from the pre-parser.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/26296006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17208 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/preparser.h

@@ -218,10 +218,6 @@ class ParserBase {
 // rather it is to speed up properly written and correct programs.
 // That means that contextual checks (like a label being declared where
 // it is used) are generally omitted.
-
-typedef uint8_t byte;
-namespace i = v8::internal;
-
 class PreParser : public ParserBase {
  public:
   enum PreParseResult {