fix checkstyle

Author: jasonlessenich

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

@@ -5,7 +5,6 @@
 import net.dv8tion.jda.api.entities.MessageChannel;
 import net.dv8tion.jda.api.entities.User;
 import net.dv8tion.jda.api.requests.restaction.MessageAction;
-import net.javadiscord.javabot.util.ExceptionLogger;
 import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;