contrib: live555: remove unused patch

The currently used live555 version already includes this patch. It hasn't been applied since 82977245.

contrib/src/live555/no-gettimeofday.patch

---- live555/groupsock/GroupsockHelper.cpp.orig	2016-03-31 10:17:46.284928287 +0200
-+++ live555/groupsock/GroupsockHelper.cpp	2016-03-31 10:20:20.428341877 +0200
-@@ -27,6 +27,7 @@
- #include <stdarg.h>
- #include <time.h>
- #include <fcntl.h>
-+#include <sys/time.h>
- #define initializeWinsockIfNecessary() 1
- #endif
- #if defined(__WIN32__) || defined(_WIN32) || defined(_QNX4)
---- live555/groupsock/include/GroupsockHelper.hh.orig	2016-03-31 10:22:56.667834195 +0200
-+++ live555/groupsock/include/GroupsockHelper.hh	2016-03-31 10:23:37.411710728 +0200
-@@ -133,6 +133,8 @@
- #if (defined(__WIN32__) || defined(_WIN32)) && !defined(__MINGW32__)
- // For Windoze, we need to implement our own gettimeofday()
- extern int gettimeofday(struct timeval*, int*);
-+#else
-+#include <sys/time.h>
- #endif
- 
- // The following are implemented in inet.c: