Android: Remove ctrl_interface=wlan0 from config template

Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

wpa_supplicant/wpa_supplicant_template.conf

@@ -1,6 +1,5 @@
 ##### wpa_supplicant configuration file template #####
 update_config=1
-ctrl_interface=wlan0
 eapol_version=1
 ap_scan=1
 fast_reauth=1