fix -Wunused-but-set-variable for gcc-4.6 on x64

src/parser.cc

Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index 949ff769ad686485e6f86239ddc88c9d43bb7b89..85b3015cc0b683b74eb7a52faaddbac79ba102f8 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -718,7 +718,6 @@ FunctionLiteral* Parser::ParseLazy(CompilationInfo* info,
 
   {
     // Parse the function literal.
-    Handle<String> no_name = isolate()->factory()->empty_symbol();
     Scope* scope = NewScope(top_scope_, Scope::GLOBAL_SCOPE, inside_with());
     if (!info->closure().is_null()) {
       scope = Scope::DeserializeScopeChain(info, scope);
@@ -3425,7 +3424,6 @@ Expression* Parser::ParseObjectLiteral(bool* ok) {
   ObjectLiteralPropertyChecker checker(this, top_scope_->is_strict_mode());
 
   Expect(Token::LBRACE, CHECK_OK);
-  Scanner::Location loc = scanner().location();
 
   while (peek() != Token::RBRACE) {
     if (fni_ != NULL) fni_->Enter();