message: Remove redundant declaration
diff: @@ -555,7 +555,6 @@ int SwiftREPL::CompleteCode(const std::string &current_code,
  repl_module =
  swift_ast->GetModule(g_repl_module_name, error);
  if (repl_module == nullptr) {
  - swift::ModuleDecl *repl_module = nullptr;
  repl_module = swift_ast->CreateModule(g_repl_module_name, error);
  const swift::SourceFile::ImplicitModuleImportKind implicit_import_kind =
  swift::SourceFile::ImplicitModuleImportKind::Stdlib;
  