[VM/nnbd] Do not apply legacy erasure to type literals.

See issue #42262.

Change-Id: I326eff8ca836c345caab266f5d27991b251e77ba
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151020
Reviewed-by: Alexander Markov <[email protected]>
Commit-Queue: Régis Crelier <[email protected]>

Author: crelier

runtime/vm/compiler/frontend/constant_reader.cc

@@ -303,9 +303,8 @@ InstancePtr ConstantReader::ReadConstantInternal(intptr_t constant_offset) {
     }
     case kTypeLiteralConstant: {
       // Build type from the raw bytes (needs temporary translator).
-      TypeTranslator type_translator(
-          &reader, this, active_class_, true,
-          active_class_->RequireLegacyErasure(null_safety));
+      // Legacy erasure is not applied to type literals. See issue #42262.
+      TypeTranslator type_translator(&reader, this, active_class_, true);
       instance = type_translator.BuildType().raw();
       break;
     }