clean up

src/main/java/org/cryptomator/ui/keyloading/hub/HubKeyLoadingStrategy.java

@@ -1,7 +1,6 @@
 package org.cryptomator.ui.keyloading.hub;
 
 import com.google.common.base.Preconditions;
-import com.nimbusds.jose.JWEObject;
 import dagger.Lazy;
 import org.cryptomator.common.keychain.KeychainManager;
 import org.cryptomator.common.keychain.NoKeychainAccessProviderException;

src/main/java/org/cryptomator/ui/keyloading/hub/RegisterDeviceController.java

@@ -40,7 +40,6 @@ import java.text.ParseException;
 import java.time.Duration;
 import java.time.Instant;
 import java.util.Objects;
-import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CompletionException;
 import java.util.concurrent.ExecutorService;
@@ -186,7 +185,7 @@ public class RegisterDeviceController implements FxController {
 		switch (cause) {
 			case CompletionException e when e.getCause() instanceof JWEHelper.InvalidJweKeyException -> invalidSetupCode.set(true);
 			default -> {
-				if(cause instanceof DeviceAlreadyExistsException) {
+				if (cause instanceof DeviceAlreadyExistsException) {
 					LOG.debug("Device already registered in hub instance {} for different user", hubConfig.authSuccessUrl);
 				} else {
 					LOG.warn("Device setup failed.", cause);

src/main/java/org/cryptomator/ui/keyloading/hub/RegisterFailedController.java

@@ -5,7 +5,6 @@ import org.cryptomator.ui.keyloading.KeyLoading;
 
 import javax.inject.Inject;
 import javax.inject.Named;
-import javafx.beans.property.BooleanProperty;
 import javafx.beans.property.SimpleBooleanProperty;
 import javafx.fxml.FXML;
 import javafx.stage.Stage;