site.in: wifi*: Remove supported_rates and basic_rate

These options have been removed and 802.11b has been disables by
default. See:
https://gluon.readthedocs.io/en/latest/releases/v2019.1.html?highlight=supported_ratesSigned-off-by: Chrissi^ <chris@tinyhost.de>

site.in

@@ -15,16 +15,9 @@
 
 	wifi24 = {
 		channel = 1,
-		-- htmode = 'HT40+',
-		-- Disabling 802.11b Rates according to gluon doc
-		-- http://gluon.readthedocs.io/en/v2016.2.5/user/site.html?highlight=site.conf
-		supported_rates = {6000, 9000, 12000, 18000, 24000, 36000, 48000, 54000},
-		basic_rate = {6000, 9000, 18000, 36000, 54000},
-
 		ap = {
 			ssid = 'Freifunk',
 		},
-
 		mesh = {
 			id = 'ffbs-mesh',
 			mcast_rate = 12000,