Cleanup

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -171,7 +171,6 @@ import java.text.NumberFormat;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collection;
 import java.util.Collections;
 import java.util.Date;
 import java.util.HashMap;

app/src/main/java/eu/faircode/email/ServiceAuthenticator.java

@@ -24,9 +24,6 @@ import static eu.faircode.email.GmailState.TYPE_GOOGLE;
 import android.accounts.AuthenticatorException;
 import android.accounts.OperationCanceledException;
 import android.content.Context;
-import android.content.SharedPreferences;
-
-import androidx.preference.PreferenceManager;
 
 import net.openid.appauth.AuthState;
 import net.openid.appauth.AuthorizationException;