modify tests

Author: Hajarel-moukh

src/main/java/fr/insee/genesis/controller/rest/responses/ContextualVariableController.java

@@ -12,7 +12,6 @@
 import lombok.AllArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.HttpStatus;
-import org.springframework.http.HttpStatusCode;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.stereotype.Controller;