wlan: Disable 6GHz for softap

Bug: 246872050
Test: softap doesn't enable on 6GHz channel
Change-Id: Ic313d6b0da7ba6a43771ea0493c468475250f819

rro_overlays/WifiOverlay/res/values/config.xml

@@ -109,9 +109,6 @@
            be checked via NL80211 interface -->
     <bool translatable="false" name="config_wifi11axSupportOverride">true</bool>
 
-    <!-- Wifi driver supports 6GHz band for softap -->
-    <bool translatable="false" name="config_wifiSoftap6ghzSupported">true</bool>
-
     <!-- Wifi driver supports WPA3 Simultaneous Authentication of Equals (WPA3-SAE) for softap -->
     <bool translatable="false" name="config_wifi_softap_sae_supported">true</bool>