remove redundant config missed in the last commit

raddb/mods-config/sql/ippool/mysql/queries.conf

@@ -40,7 +40,7 @@
 #  allocate_clear clears stale IP addresses before processing a new request
 #
 #  The first version clears based on pool_key and thus will only
-#  clear previous entries for the user requesting and address.
+#  clear previous entries for the user requesting an address.
 #
 #  The second version clears all stale allocations for the requesting NAS
 #
@@ -110,19 +110,6 @@ allocate_find = "\
 #	LIMIT 1 \
 #	FOR UPDATE ${skip_locked}"
 
-#
-#  The above query again, but with SKIP LOCKED. This requires MySQL >= 8.0.1,
-#  and InnoDB.
-#
-#allocate_find = "\
-#	SELECT framedipaddress FROM ${ippool_table} \
-#	WHERE pool_name = '%{control:${pool_name}}' \
-#	AND expiry_time IS NULL \
-#	ORDER BY \
-#		RAND() \
-#	LIMIT 1 \
-#	FOR UPDATE SKIP LOCKED"
-
 #
 #  pool_check allows the module to differentiate between a full pool
 #  and no pool when an IP address could not be allocated so an appropriate