libvlc: Remove upstreamed patch

(cherry picked from commit bb701d87)

libvlc/patches/vlc3/libvlc_patches_0007-upnp-Fix-potential-race-during-tear-down.patch

-From 584a75d9091f146dc001ef4ddad5c5a390dcd0cc Mon Sep 17 00:00:00 2001
-Message-Id: <584a75d9091f146dc001ef4ddad5c5a390dcd0cc.1565098819.git.geoffrey.metais@gmail.com>
-From: =?UTF-8?q?Hugo=20Beauz=C3=A9e-Luyssen?= <hugo@beauzee.fr>
-Date: Fri, 15 Mar 2019 15:41:50 +0100
-Subject: [PATCH] upnp: Fix potential race during tear down.
-
-If two threads call UpnpFinish at the same time (or more precisely, if a
-2nd thread calls UpnpFinish before the first one sets UpnpSdkInit to 0)
-we can end up double releasing most libupnp resources
----
- modules/services_discovery/upnp.cpp | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/modules/services_discovery/upnp.cpp b/modules/services_discovery/upnp.cpp
-index f1037c82c8..16ed325724 100644
---- a/modules/services_discovery/upnp.cpp
-+++ b/modules/services_discovery/upnp.cpp
-@@ -1709,8 +1709,8 @@ void UpnpInstanceWrapper::release(bool isSd)
-         p_delete = s_instance;
-         s_instance = NULL;
-     }
--    vlc_mutex_unlock( &s_lock );
-     delete p_delete;
-+    vlc_mutex_unlock( &s_lock );
- }
- 
- UpnpClient_Handle UpnpInstanceWrapper::handle() const
--- 
-2.20.1
-