fix: checkstyle

Signed-off-by: LE SAULNIER Kevin <[email protected]>

Author: LE SAULNIER Kevin

src/test/java/org/gridsuite/securityanalysis/server/ContingencyLimitViolationTest.java

@@ -11,7 +11,6 @@
 import com.powsybl.iidm.network.test.EurostagTutorialExample1Factory;
 import com.powsybl.iidm.network.util.LimitViolationUtils;
 import com.powsybl.security.LimitViolation;
-import com.powsybl.security.LimitViolationBuilder;
 import com.powsybl.security.LimitViolationType;
 import org.gridsuite.securityanalysis.server.entities.ContingencyLimitViolationEntity;
 import org.gridsuite.securityanalysis.server.entities.SubjectLimitViolationEntity;