Removing unused import.

components/device-mgt/org.wso2.carbon.device.mgt.core/src/test/java/org/wso2/carbon/device/mgt/core/operation/OperationManagementTests.java

@@ -37,7 +37,6 @@ import org.wso2.carbon.device.mgt.common.push.notification.NotificationStrategy;
 import org.wso2.carbon.device.mgt.core.DeviceManagementConstants;
 import org.wso2.carbon.device.mgt.core.TestDeviceManagementService;
 import org.wso2.carbon.device.mgt.core.authorization.DeviceAccessAuthorizationServiceImpl;
-import org.wso2.carbon.device.mgt.core.common.BaseDeviceManagementTest;
 import org.wso2.carbon.device.mgt.core.common.TestDataHolder;
 import org.wso2.carbon.device.mgt.core.config.DeviceConfigurationManager;
 import org.wso2.carbon.device.mgt.core.internal.DeviceManagementDataHolder;