doc: remove outdated reference to river-layouts(1)

 doc/river.1.scd | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/river.1.scd b/doc/river.1.scd
index bd38fa1..1b3e4d0 100644
--- a/doc/river.1.scd
+++ b/doc/river.1.scd
@@ -71,4 +71,4 @@ source contributors. For more information about river's development, see
 
 # SEE ALSO
 
-*riverctl*(1), *river-layouts*(7), *rivertile*(1)
+*riverctl*(1), *rivertile*(1)