chore: Remove runtime dependency on EndpointGeneratorTaskFactory

Author: Artur-

flow-server/src/main/java/com/vaadin/flow/server/startup/LookupServletContainerInitializer.java

@@ -42,7 +42,6 @@
 import com.vaadin.flow.server.StaticFileHandlerFactory;
 import com.vaadin.flow.server.VaadinContext;
 import com.vaadin.flow.server.VaadinServletContext;
-import com.vaadin.flow.server.frontend.EndpointGeneratorTaskFactory;
 
 /**
  * Standard servlet initializer for collecting all SPI implementations.
@@ -54,7 +53,6 @@
  */
 @HandlesTypes({ ResourceProvider.class, InstantiatorFactory.class,
         DeprecatedPolymerPublishedEventHandler.class,
-        EndpointGeneratorTaskFactory.class,
         ApplicationConfigurationFactory.class, AbstractLookupInitializer.class,
         AppShellPredicate.class, StaticFileHandlerFactory.class,
         DevModeHandlerManager.class, BrowserLiveReloadAccessor.class,