init: remove bogus check for NULL parent

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/init.c b/init.c
index 35fbdf1..215b60d 100644
--- a/init.c
+++ b/init.c
@@ -364,7 +364,7 @@
 
 	td->thread_number = thread_number;
 
-	if (!parent || !parent->o.group_reporting)
+	if (!parent->o.group_reporting)
 		stat_number++;
 
 	set_cmd_options(td);