Remove not used WeightValidationHelper (#2916)

Signed-off-by: Avgustin Marinov <Avgustin.Marinov@bosch.com>

hawkbit-ddi/hawkbit-ddi-server/src/main/java/org/eclipse/hawkbit/app/ddi/DdiStart.java

@@ -20,7 +20,7 @@ import org.springframework.web.servlet.view.RedirectView;
  * The minimal configuration for the stand alone hawkBit DDI server.
  */
 @SpringBootApplication(scanBasePackages = "org.eclipse.hawkbit")
-public class DDIStart {
+public class DdiStart {
 
     /**
      * Main method to start the spring-boot application.
@@ -28,7 +28,7 @@ public class DDIStart {
      * @param args the VM arguments.
      */
     public static void main(final String[] args) {
-        SpringApplication.run(DDIStart.class, args);
+        SpringApplication.run(DdiStart.class, args);
     }
 
     @Controller