deprecation fixes.

Author: syslogic

mobile/src/main/java/io/syslogic/github/activity/AuthenticatorActivity.java

@@ -3,7 +3,6 @@
 import android.accounts.Account;
 import android.accounts.AccountAuthenticatorResponse;
 import android.accounts.AccountManager;
-import android.content.pm.PackageManager;
 import android.os.Bundle;
 import android.text.Editable;
 import android.widget.Toast;

mobile/src/main/java/io/syslogic/github/network/TokenHelper.java

@@ -2,7 +2,6 @@
 
 import android.accounts.Account;
 import android.accounts.AccountManager;
-import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;