test: remove tests for CategoryServiceImpl class

The following issue won't be fixed:
Closes #825
Closes #1629

Part of #1668

Author: php-coder

src/main/java/ru/mystamps/web/feature/category/CategoryServiceImpl.java

@@ -91,7 +91,6 @@ public List<Integer> findIdsByNames(List<String> names) {
 		return categoryDao.findIdsByNames(lowerCasesNames);
 	}
 
-	// @todo #819 CategoryServiceImpl.findIdsWhenNameStartsWith(): add unit test for converting to lower case
 	@Override
 	@Transactional(readOnly = true)
 	public List<Integer> findIdsWhenNameStartsWith(String name) {
@@ -115,7 +114,6 @@ public List<LinkEntityDto> findAllAsLinkEntities(String lang) {
 		return categoryDao.findAllAsLinkEntities(lang);
 	}
 
-	// @todo #1605 CategoryService.findAllForSitemap(): add unit test
 	@Override
 	@Transactional(readOnly = true)
 	public List<SitemapInfoDto> findAllForSitemap() {