removed unused warnings

src/main/java/es/uv/dagarcos/shard/persistence/service/WorldQueryService.java

@@ -7,7 +7,6 @@ import es.uv.dagarcos.shard.persistence.domain.WorldState;
 import es.uv.dagarcos.shard.persistence.repository.WorldEventRepository;
 
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.data.domain.PageRequest;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;