Drop unknown attribute "authenticationtype", never parsed

According to packages/providers/TelephonyProvider/src/com/android/providers/telephony/TelephonyProvider.java,
getRow() method is knowing nothing about such attribute and just ignore it.
So it should do no harm to remove such.
There's a "authtype" attribute that is parsed, but its value should be an integer.

Change-Id: I9cca16cdd68db30c3a1f76149b0699d49d82fb71
1 file changed