Remove delete device type from DB when un register plugin

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

@@ -45,12 +45,6 @@ public class DeviceManagementRepository {
 
     public void removeDeviceManagementProvider(DeviceMgtService provider) throws DeviceManagementException {
         String deviceType = provider.getProviderType();
-        try {
-            DeviceManagerUtil.unregisterDeviceType(deviceType);
-        } catch (DeviceManagementException e) {
-            throw new DeviceManagementException("Error occurred while removing device management provider '" +
-                    deviceType + "'", e);
-        }
         providers.remove(deviceType);
     }
 

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/util/DeviceManagerUtil.java

@@ -142,7 +142,7 @@ public final class DeviceManagerUtil {
         try {
             DeviceTypeDAO deviceTypeDAO = DeviceManagementDAOFactory.getDeviceTypeDAO();
             DeviceType deviceType = deviceTypeDAO.getDeviceType(typeName);
-            if (deviceType == null) {
+            if (deviceType != null) {
                 DeviceType dt = new DeviceType();
                 dt.setName(typeName);
                 deviceTypeDAO.removeDeviceType(typeName);