Some compilers found and complained about this unused variable.

-- 
:wq Claudio

Index: imsg-buffer.c
===================================================================
RCS file: /cvs/src/lib/libutil/imsg-buffer.c,v
diff -u -p -r1.35 imsg-buffer.c
--- imsg-buffer.c	4 Jun 2025 09:06:56 -0000	1.35
+++ imsg-buffer.c	23 Aug 2025 21:33:47 -0000
@@ -686,8 +686,6 @@ msgbuf_queuelen(struct msgbuf *msgbuf)
 void
 msgbuf_clear(struct msgbuf *msgbuf)
 {
-	struct ibuf	*buf;
-
 	/* write side */
 	ibufq_flush(&msgbuf->bufs);