GET /content/test/***********.html HTTP/1.1]org.apache.sling.servlets.get.impl.DefaultGetServlet No renderer for extension html

Question

I am seeing below error for many of the content pages in logs.

Enable JSON and Enable XML are selected for DefaultGetServlet and I am using AEM 6.5 version.

GET /content/test/***********.html HTTP/1.1]org.apache.sling.servlets.get.impl.DefaultGetServlet No renderer for extension html, cannot render resource JcrNodeResource, type=nt:unstructured, superType=null, path=/content/******/jcr:content/root/responsivegrid/*****_copy.

While debugging I have observed that nodes are not having sling:resourceType. We have the same issue for "n" of nodes in our project. How can we delete these nodes using servlet?

For example: How can I delete text node which does not have sling:resourceType.

/content
  /company
    /us/en
      /test
        /text