refactor: remove check endpoint (#34)

Author: ndr-brt

src/main/java/org/eclipse/dataplane/port/DataPlaneSignalingApiController.java

@@ -47,12 +47,6 @@ public DataPlaneSignalingApiController(Dataplane dataplane) {
         this.dataplane = dataplane;
     }
 
-    @GET
-    @Path("/")
-    public Response check() {
-        return Response.ok().build();
-    }
-
     @POST
     @Path("/prepare")
     public Response prepare(DataFlowPrepareMessage message) {