changed wxFDIODispatcher::UnregisterFD() to take only fd, without flags, and unregister it unconditionally; use ModifyFD() to just change the flags (modified part of patch 1733626)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@47469 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/epolldispatcher.cpp

@@ -120,7 +120,7 @@ bool wxEpollDispatcher::ModifyFD(int fd, wxFDIOHandler* handler, int flags)
     return true;
 }
 
-bool wxEpollDispatcher::UnregisterFD(int fd, int flags)
+bool wxEpollDispatcher::UnregisterFD(int fd)
 {
     epoll_event ev;
     ev.events = 0;