[BI-2040] removed unused import-statements from ObservationVariableService.java

Author: davedrp

src/main/java/org/brapi/test/BrAPITestServer/service/pheno/ObservationVariableService.java

@@ -1,14 +1,11 @@
 package org.brapi.test.BrAPITestServer.service.pheno;
 
 import java.util.*;
-import java.util.stream.Collectors;
 
 import jakarta.validation.Valid;
 
 import org.brapi.test.BrAPITestServer.exceptions.BrAPIServerDbIdNotFoundException;
 import org.brapi.test.BrAPITestServer.exceptions.BrAPIServerException;
-import org.brapi.test.BrAPITestServer.model.entity.BrAPIBaseEntity;
-import org.brapi.test.BrAPITestServer.model.entity.ExternalReferenceEntity;
 import org.brapi.test.BrAPITestServer.model.entity.core.CropEntity;
 import org.brapi.test.BrAPITestServer.model.entity.pheno.*;
 import org.brapi.test.BrAPITestServer.repository.core.TraitRepository;
@@ -24,7 +21,6 @@
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.domain.Page;
-import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
 import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;