Merge pull request #39258 from DougGregor/remove-serialization-assert

Author: swift-ci

lib/Serialization/Serialization.cpp

@@ -1490,9 +1490,6 @@ void Serializer::writeASTBlockEntity(
       ++numValueWitnesses;
       data.push_back(addDeclRef(req));
       data.push_back(addDeclRef(witness.getDecl()));
-      assert(witness.getDecl() || req->getAttrs().hasAttribute<OptionalAttr>()
-             || req->getAttrs().isUnavailable(req->getASTContext())
-             || allowCompilerErrors());
 
       // If there is no witness, we're done.
       if (!witness.getDecl()) return;