skip include processor should only process includes from Jetty home

lib/skip-include-processor.js

@@ -1,15 +1,15 @@
 'use strict'
 
 /**
- * A temporary include processor to silence javadoc and $JETTY_HOME includes.
+ * An include processor to silence $JETTY_HOME includes for quick builds.
  */
 function createExtensionGroup (registry) {
   return function () {
     this.includeProcessor(function () {
       let directive
       this.prefer() // register in front of Antora's include processor
       this.handles((target) => {
-        if (target !== 'javadoc' && !target.startsWith('${jetty.home}')) return
+        if (!target.startsWith('${jetty.home}')) return
         directive = registry.document.getReader().getLines()[0]
         return true
       })