Clean up unused code

package.json

@@ -11,6 +11,7 @@
     "activated sludge",
     "wastewater",
     "biological model",
+    "EVOLV",
     "node-red"
   ],
   "license": "SEE LICENSE",
@@ -21,9 +22,7 @@
   },
   "node-red": {
     "nodes": {
-      "reactor": "reactor.js",
-      "recirculation-pump": "additional_nodes/recirculation-pump.js",
-      "settling-basin": "additional_nodes/settling-basin.js"
+      "reactor": "reactor.js"
     }
   },
   "dependencies": {