Remove unnecessary ClassLiteral name member and simplify Function.name handling

src/parsing/preparser.h

Index: src/parsing/preparser.h
diff --git a/src/parsing/preparser.h b/src/parsing/preparser.h
index 976fa7cfe7dbaf39600f605e9b01d9f538082502..67c6bd2a69225dae0f411884bc2a7e17dde2e7a4 100644
--- a/src/parsing/preparser.h
+++ b/src/parsing/preparser.h
@@ -804,11 +804,6 @@ class PreParserTraits {
     return PreParserExpression::Default();
   }
 
-  static PreParserExpression DefaultConstructor(bool call_super, Scope* scope,
-                                                int pos, int end_pos) {
-    return PreParserExpression::Default();
-  }
-
   static PreParserExpression ExpressionFromLiteral(
       Token::Value token, int pos, Scanner* scanner,
       PreParserFactory* factory) {