libupnp: remove patch that should not be there

Signed-off-by: Rosen Penev <rosenp@gmail.com>

libs/libupnp/patches/100-fix-pthread-detach.patch

@@ -1,24 +0,0 @@
-From 386b7ed79146ecf7a3bba49f48cb8f41a9b49170 Mon Sep 17 00:00:00 2001
-From: Jean-Francois Dockes <jf@dockes.org>
-Date: Sun, 27 Jan 2019 10:44:17 +0100
-Subject: [PATCH] Do not try to detach detached thread, the result is
- undefined. Fixes issue #102
-
----
- upnp/src/threadutil/ThreadPool.c | 5 -----
- 1 file changed, 5 deletions(-)
-
---- a/upnp/src/threadutil/ThreadPool.c
-+++ b/upnp/src/threadutil/ThreadPool.c
-@@ -651,11 +651,6 @@ static int CreateWorker(
- 	rc = ithread_create(&temp, &attr, WorkerThread, tp);
- 	ithread_attr_destroy(&attr);
- 	if (rc == 0) {
--		rc = ithread_detach(temp);
--		/* ithread_detach will return EINVAL if thread has been
--		 successfully detached by ithread_create */
--		if (rc == EINVAL)
--			rc = 0;
- 		tp->pendingWorkerThreadStart = 1;
- 		/* wait until the new worker thread starts */
- 		while (tp->pendingWorkerThreadStart) {