fix checkstyle

Author: jasonlessenich

src/main/java/net/javadiscord/javabot/api/exception/InternalServerException.java

@@ -1,7 +1,6 @@
 package net.javadiscord.javabot.api.exception;
 
 import org.springframework.beans.BeansException;
-import org.springframework.lang.Nullable;
 
 /**
  * An exception which is thrown for invalid JDA entity ids.

src/main/java/net/javadiscord/javabot/api/routes/qotw_leaderboard/QOTWLeaderboardController.java

@@ -10,7 +10,6 @@
 import net.javadiscord.javabot.systems.qotw.QOTWPointsService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
-import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;

src/main/java/net/javadiscord/javabot/api/routes/user_profile/UserProfileController.java

@@ -21,7 +21,6 @@
 import net.javadiscord.javabot.util.Pair;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
-import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;

src/main/java/net/javadiscord/javabot/util/ColorUtils.java

@@ -1,7 +1,5 @@
 package net.javadiscord.javabot.util;
 
-import org.jetbrains.annotations.NotNull;
-
 import java.awt.*;
 import java.util.Random;
 import java.util.concurrent.ThreadLocalRandom;