init: remove leftover unused variable

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/init.c b/init.c
index b0a7c35..ccd6342 100644
--- a/init.c
+++ b/init.c
@@ -413,7 +413,7 @@
 static int fixup_options(struct thread_data *td)
 {
 	struct thread_options *o = &td->o;
-	int i, ret = 0;
+	int ret = 0;
 
 #ifndef FIO_HAVE_PSHARED_MUTEX
 	if (!o->use_thread) {