package/libwebsock: remove package

The upstream Github repository payden/libwebsock is no longer available,
and its URL now redirects to some completely unrelated software.
We don't know for sure what happened, but at least the package does not
build anymore, because its source code has vanished.

Since no other buildroot package depends on libwebsock, and it hasn't
received any update; let's simply remove it from here.

Signed-off-by: Titouan Christophe <titouan.christophe@mind.be>
Signed-off-by: Julien Olivain <ju.o@free.fr>

DEVELOPERS

@@ -1345,7 +1345,6 @@ F:	package/gengetopt/
 F:	package/janus-gateway/
 F:	package/libnice/
 F:	package/libsrtp/
-F:	package/libwebsock/
 F:	package/sofia-sip/
 
 N:	Grzegorz Blach <grzegorz@blach.pl>