[cleanup] Remove unused PreParser factory method

src/parsing/preparser.h

Index: src/parsing/preparser.h
diff --git a/src/parsing/preparser.h b/src/parsing/preparser.h
index 969e3fbcb271365c906d6df7015fcbbf0209e990..8badfe5a5b4c84ad1987d04f606242870da5b580 100644
--- a/src/parsing/preparser.h
+++ b/src/parsing/preparser.h
@@ -472,11 +472,6 @@ class PreParserFactory {
     return PreParserExpression::Default();
   }
   PreParserExpression NewArrayLiteral(PreParserExpressionList values,
-                                      int literal_index,
-                                      int pos) {
-    return PreParserExpression::ArrayLiteral();
-  }
-  PreParserExpression NewArrayLiteral(PreParserExpressionList values,
                                       int first_spread_index, int literal_index,
                                       int pos) {
     return PreParserExpression::ArrayLiteral();