Refactoring: remove unused fields

src/main/java/de/deadlocker8/budgetmaster/categories/CategoryService.java

 package de.deadlocker8.budgetmaster.categories;
 
-import de.deadlocker8.budgetmaster.icon.IconService;
 import de.deadlocker8.budgetmaster.services.AccessAllEntities;
 import de.deadlocker8.budgetmaster.services.AccessEntityByID;
 import de.deadlocker8.budgetmaster.services.Resettable;
@@ -22,13 +21,11 @@ public class CategoryService implements Resettable, AccessAllEntities<Category>,
 {
 	private static final Logger LOGGER = LoggerFactory.getLogger(CategoryService.class);
 	private final CategoryRepository categoryRepository;
-	private final IconService iconService;
 
 	@Autowired
-	public CategoryService(CategoryRepository categoryRepository, IconService iconService)
+	public CategoryService(CategoryRepository categoryRepository)
 	{
 		this.categoryRepository = categoryRepository;
-		this.iconService = iconService;
 
 		createDefaults();
 	}

src/main/java/de/deadlocker8/budgetmaster/hints/HintService.java

 package de.deadlocker8.budgetmaster.hints;
 
 import de.deadlocker8.budgetmaster.services.Resettable;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -12,8 +10,6 @@ import java.util.List;
 @Service
 public class HintService implements Resettable
 {
-	private static final Logger LOGGER = LoggerFactory.getLogger(HintService.class);
-
 	private final HintRepository hintRepository;
 
 	@Autowired