Remove some leftovers of full-codegen's generators implementation.

src/full-codegen/s390/full-codegen-s390.cc

Index: src/full-codegen/s390/full-codegen-s390.cc
diff --git a/src/full-codegen/s390/full-codegen-s390.cc b/src/full-codegen/s390/full-codegen-s390.cc
index 531ca051d2340a56471615e905512edc8e283f36..6efc0f1ace5b5deeefa2c3ae47fb77a535d2d225 100644
--- a/src/full-codegen/s390/full-codegen-s390.cc
+++ b/src/full-codegen/s390/full-codegen-s390.cc
@@ -151,8 +151,6 @@ void FullCodeGenerator::Generate() {
   {
     Comment cmnt(masm_, "[ Allocate locals");
     int locals_count = info->scope()->num_stack_slots();
-    // Generators allocate locals, if any, in context slots.
-    DCHECK(!IsGeneratorFunction(info->literal()->kind()) || locals_count == 0);
     OperandStackDepthIncrement(locals_count);
     if (locals_count > 0) {
       if (locals_count >= 128) {