Undocument 'schemacheck off'

doc/man/man5/slapd.conf.5

@@ -523,9 +523,6 @@ The
 property specifies the maximum security layer receive buffer
 size allowed.  0 disables security layers.  The default is 65536.
 .TP
-.B schemacheck { on | off }
-Turn schema checking on or off. The default is on.
-.TP
 .B security <factors>
 Specify a set of factors (separated by white space) to require.
 An integer value is associated with each factor and is roughly