Remove unused code for IsFutureStrictReserved.

src/parsing/parser.h

Index: src/parsing/parser.h
diff --git a/src/parsing/parser.h b/src/parsing/parser.h
index 934b0ce8df44223aa2a15483ba08028d787f56c4..1c0057559c82b086cf418f31dd0a238062f5ef20 100644
--- a/src/parsing/parser.h
+++ b/src/parsing/parser.h
@@ -690,10 +690,6 @@ class V8_EXPORT_PRIVATE Parser : public NON_EXPORTED_BASE(ParserBase<Parser>) {
     return identifier == ast_value_factory()->undefined_string();
   }
 
-  V8_INLINE bool IsFutureStrictReserved(const AstRawString* identifier) const {
-    return scanner()->IdentifierIsFutureStrictReserved(identifier);
-  }
-
   // Returns true if the expression is of type "this.foo".
   V8_INLINE static bool IsThisProperty(Expression* expression) {
     DCHECK(expression != NULL);