From default settings of glass its not possible to disable WiFi. To do the things you have to follow some instructions and install android default launcher and settings so that you can get the settings UI as your android device and do the rest of the desire works.
I am describing the whole process here :
At first you have to download these two apk.
- Settings.apk - http://goo.gl/EqV8u
- Launcher2.apk - http://goo.gl/ytfSn
After that you have to install these two apps into your glass by ADB :
1. adb install Settings.apk 2. adb install Launcher2.apk
Please be careful not to check the “Use as Default” box or you will not be able to access your Glass Settings until you uninstall Launcher2.apk.
After complete installing go to your settings and select launcher. After selecting android default launcher you will get the setting UI as like as your android device. Now you can do whatever you want like WiFi enable/disable, Bluetooth enable/disable and etc. But there have some issues which not working like Bluetooth Tethering, Data Usage , Airplane Mode and some more features.
Details process of using the settings and launcher and not working features.
If you want to uninstall the installed app at first see your app packages name and delete the app from the devices using below script :
adb shell pm list packages [see all of your installed app list]
abd shell pm uninstall -k com.packagename [your app by specific package name]
After above script you will get your previous glass settings.
Here is the excellent video where all these process has been described in nice way.