Fixing the compile error

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderServiceImpl.java

@@ -315,22 +315,6 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
         return enrolmentInfos;
     }
 
-    @Override
-    public List<Integer> getDeviceEnrolledTenants() throws DeviceManagementException {
-        try {
-            DeviceManagementDAOFactory.openConnection();
-            return deviceDAO.getDeviceEnrolledTenants();
-        } catch (DeviceManagementDAOException e) {
-            throw new DeviceManagementException("Error occurred while retrieving the tenants " +
-                    "which have device enrolled.", e);
-        } catch (SQLException e) {
-            throw new DeviceManagementException("Error occurred while opening a connection to the data source", e);
-        } finally {
-            DeviceManagementDAOFactory.closeConnection();
-        }
-    }
-
-
         @Override
     public boolean disenrollDevice(DeviceIdentifier deviceId) throws DeviceManagementException {
         DeviceManager deviceManager = this.getDeviceManager(deviceId.getType());