Remove duplicate inclusion of unistd.h in memory-failure.c to clean up
redundant code.

Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
---
 tools/testing/selftests/mm/memory-failure.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/tools/testing/selftests/mm/memory-failure.c b/tools/testing/selftests/mm/memory-failure.c
index 3d9e0b9ffb41..032ed952057c 100644
--- a/tools/testing/selftests/mm/memory-failure.c
+++ b/tools/testing/selftests/mm/memory-failure.c
@@ -13,7 +13,6 @@
 #include <unistd.h>
 #include <signal.h>
 #include <setjmp.h>
-#include <unistd.h>
 #include <fcntl.h>
 #include <sys/vfs.h>
 #include <linux/magic.h>
-- 
2.25.1