Remove all WIN32 ifdefs (unifdef -UWIN32)

Just use cygwin.

This looks like it wasn't enough to do anything useful, and I don't
think anyone cares about supporting win32 the hard way.

src/core/net-disconnect.c

@@ -116,7 +116,6 @@ void net_disconnect_init(void)
 
 void net_disconnect_deinit(void)
 {
-#ifndef WIN32
 	NET_DISCONNECT_REC *rec;
 	time_t now, max;
 	int first, fd;
@@ -155,5 +154,4 @@ void net_disconnect_deinit(void)
 			first = 0;
 		}
 	}
-#endif
 }