How do I disable the Mobile Hotspot feature?
I managed to solve this without deleting hostapd file (with this method you can easily reactivate hotspot functionality renaming hostapd back to its original name).


Root your phone
Open up adb connection
Enter these commands:


su
cd system
cd bin
mount -o rw,remount /system
mv hostapd inactive_hostapd
mount -o ro,remount /system

Reboot your phone and you're ready to go.


If you want hotspot functionality back to your phone, just rename it back to 'hostapd' (mv inactive_hostapd hostapd).

Tested on Motorola Moto C Plus.