made classes that extend NotificationService final

Author: jasonlessenich

src/main/java/net/javadiscord/javabot/systems/notification/GuildNotificationService.java

@@ -8,7 +8,7 @@
 /**
  * Sends notifications within a single {@link Guild}.
  */
-public non-sealed class GuildNotificationService extends NotificationService {
+public final class GuildNotificationService extends NotificationService {
 
 	private final Guild guild;
 	private final GuildConfig config;

src/main/java/net/javadiscord/javabot/systems/notification/NotificationService.java

@@ -10,7 +10,7 @@
  * Abstract class used for sending Notifications to Discord Users and Channels.
  */
 @Slf4j
-public abstract sealed class NotificationService permits GuildNotificationService, QOTWNotificationService {
+public abstract class NotificationService {
 	void sendDirectMessageNotification(User user, MessageEmbed message) {
 		user.openPrivateChannel().queue(
 				channel -> channel.sendMessageEmbeds(message).queue(),

src/main/java/net/javadiscord/javabot/systems/notification/QOTWNotificationService.java

@@ -25,7 +25,7 @@
  * Sends Notifications regarding QOTW.
  */
 @Slf4j
-public non-sealed class QOTWNotificationService extends NotificationService {
+public final class QOTWNotificationService extends NotificationService {
 
 	@Nullable
 	private final User user;