stream_op cleanup: pollset changes
diff --git a/src/core/iomgr/pollset_windows.c b/src/core/iomgr/pollset_windows.c
index 9f74580..4443a6a 100644
--- a/src/core/iomgr/pollset_windows.c
+++ b/src/core/iomgr/pollset_windows.c
@@ -112,7 +112,6 @@
 
 void grpc_pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                            grpc_closure *closure) {
-  gpr_mu_lock(&grpc_polling_mu);
   pollset->shutting_down = 1;
   grpc_pollset_kick(pollset, GRPC_POLLSET_KICK_BROADCAST);
   if (!pollset->is_iocp_worker) {
@@ -120,11 +119,12 @@
   } else {
     pollset->on_shutdown = closure;
   }
-  gpr_mu_unlock(&grpc_polling_mu);
 }
 
 void grpc_pollset_destroy(grpc_pollset *pollset) {}
 
+void grpc_pollset_reset(grpc_pollset *pollset) {}
+
 void grpc_pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                        grpc_pollset_worker *worker, gpr_timespec now,
                        gpr_timespec deadline) {