Bluetooth: Mesh: Resolve dead code in store_seg

If CONFIG_BT_MESH_SEQ_STORE_RATE is 1, the check in store_seq can be
reduced to a simple if (false), and the modulo code does not need to be
included in the build.

Fixes zephyrproject-rtos#33036.

Signed-off-by: Trond Einar Snekvik <Trond.Einar.Snekvik@nordicsemi.no>

subsys/bluetooth/mesh/net.c

@@ -150,7 +150,7 @@ static void store_iv(bool only_duration)
 
 static void store_seq(void)
 {
-	if (CONFIG_BT_MESH_SEQ_STORE_RATE &&
+	if (CONFIG_BT_MESH_SEQ_STORE_RATE > 1 &&
 	    (bt_mesh.seq % CONFIG_BT_MESH_SEQ_STORE_RATE)) {
 		return;
 	}