libthread: remove bogus write in threadmain

src/libthread/thread.c

diff --git a/src/libthread/thread.c b/src/libthread/thread.c
index 48dd3e1..9b47e76 100644
--- a/src/libthread/thread.c
+++ b/src/libthread/thread.c
@@ -669,7 +669,6 @@
 
 	argv0 = argv[0];
 
-	write(1, "", 0);
 	if(getenv("NOLIBTHREADDAEMONIZE") == nil)
 		_threadsetupdaemonize();