Documentation/timers/hpet_example: drop duplicate header files

Documentation/timers/hpet_example.c: fcntl.h is included more than once.
Documentation/timers/hpet_example.c: signal.h is included more than once.

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/Documentation/timers/hpet_example.c b/Documentation/timers/hpet_example.c
index f9ce2d9..4bfafb7 100644
--- a/Documentation/timers/hpet_example.c
+++ b/Documentation/timers/hpet_example.c
@@ -10,7 +10,6 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <signal.h>
-#include <fcntl.h>
 #include <errno.h>
 #include <sys/time.h>
 #include <linux/hpet.h>
@@ -24,7 +23,6 @@
 
 #include <sys/poll.h>
 #include <sys/ioctl.h>
-#include <signal.h>
 
 struct hpet_command {
 	char		*command;