um: remove SIGHUP handler

The UML kernel ignores SIGHUP anyway.  This handler is in vain.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c
index 39613ea..fb2a97a 100644
--- a/arch/um/os-Linux/main.c
+++ b/arch/um/os-Linux/main.c
@@ -142,7 +142,6 @@
 	 */
 	install_fatal_handler(SIGINT);
 	install_fatal_handler(SIGTERM);
-	install_fatal_handler(SIGHUP);
 
 	scan_elf_aux(envp);