SeriesController: fix warnings from PMD/CheckStyle about long line and unused import.

Corrections for 33a7067 commit.

No functional changes.

Author: php-coder

src/main/java/ru/mystamps/web/controller/SeriesController.java

@@ -47,7 +47,6 @@
 
 import ru.mystamps.web.Url;
 import ru.mystamps.web.entity.Category;
-import ru.mystamps.web.entity.Collection;
 import ru.mystamps.web.entity.Country;
 import ru.mystamps.web.entity.Series;
 import ru.mystamps.web.entity.User;
@@ -282,7 +281,8 @@ public String removeFromCollection(
 			return null;
 		}
 
-		UrlEntityDto collection = collectionService.removeFromCollection(currentUser.getId(), series.getId());
+		UrlEntityDto collection =
+			collectionService.removeFromCollection(currentUser.getId(), series.getId());
 
 		redirectAttributes.addFlashAttribute("justRemovedSeries", true);