refactor: fix tests

Author: Ayzat Murtazin

src/test/java/ru/yandex/practicum/filmorate/storage/FilmDbStorageTest.java

@@ -303,7 +303,7 @@ void testDeleteFilm() {
     void testDeleteNotExistingUser() {
         int filmId = 999;
         String formattedResponse = String.format("Фильм с id '%s' не найден.", filmId);
-        NotFoundException e = assertThrows(NotFoundException.class, () -> filmDbStorage.findById(filmId));
+        NotFoundException e = assertThrows(NotFoundException.class, () -> filmDbStorage.remove(filmId));
         assertEquals(formattedResponse, e.getMessage());
     }
 

src/test/java/ru/yandex/practicum/filmorate/storage/UserDbStorageTest.java

@@ -331,7 +331,7 @@ void testDeleteUser() {
     void testDeleteNotExistingUser() {
         int userId = 999;
         String formattedResponse = String.format("Пользователь с id '%s' не найден.", userId);
-        NotFoundException e = assertThrows(NotFoundException.class, () -> userStorage.findById(userId));
+        NotFoundException e = assertThrows(NotFoundException.class, () -> userStorage.remove(userId));
         assertEquals(formattedResponse, e.getMessage());
     }
 }