[parser] Remove RETURN_IF* part 10

Bug: v8:8363, v8:7926
Change-Id: I19d878139b383799081dea296b951ce6945b05d3
Reviewed-on: https://chromium-review.googlesource.com/c/1301853
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57045}

src/ast/ast.h

@@ -3246,7 +3246,6 @@ class AstNodeFactory final {
   }
 
   YieldStar* NewYieldStar(Expression* expression, int pos) {
-    DCHECK_NOT_NULL(expression);
     return new (zone_) YieldStar(expression, pos);
   }