selftests/timens: remove ARRAY_SIZE define from individual tests

ARRAY_SIZE is defined in several selftests. Remove definitions from
individual test files and include header file for the define instead.
ARRAY_SIZE define is added in a separate patch to prepare for this
change.

Remove ARRAY_SIZE from timens tests and pickup the one defined in
kselftest.h.
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/timens/procfs.c

@@ -24,8 +24,6 @@
 #define DAY_IN_SEC			(60*60*24)
 #define TEN_DAYS_IN_SEC			(10*DAY_IN_SEC)
 
-#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
-
 static int child_ns, parent_ns;
 
 static int switch_ns(int fd)

tools/testing/selftests/timens/timens.c

@@ -22,8 +22,6 @@
 #define DAY_IN_SEC			(60*60*24)
 #define TEN_DAYS_IN_SEC			(10*DAY_IN_SEC)
 
-#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
-
 struct test_clock {
 	clockid_t id;
 	char *name;