diff --git a/nodes/core/core/58-debug.js b/nodes/core/core/58-debug.js
index 2c7b2b279..7436bf2cb 100644
--- a/nodes/core/core/58-debug.js
+++ b/nodes/core/core/58-debug.js
@@ -16,7 +16,6 @@
 
 module.exports = function(RED) {
     var util = require("util");
-    var ws = require("ws");
     var events = require("events");
     var debuglength = RED.settings.debugMaxLength||1000;
     var useColors = false;
diff --git a/nodes/core/core/80-function.js b/nodes/core/core/80-function.js
index 223e6a60b..e1413a7a9 100644
--- a/nodes/core/core/80-function.js
+++ b/nodes/core/core/80-function.js
@@ -18,8 +18,6 @@ module.exports = function(RED) {
     "use strict";
     var util = require("util");
     var vm = require("vm");
-    var fs = require('fs');
-    var fspath = require('path');
 
     function FunctionNode(n) {
         RED.nodes.createNode(this,n);
diff --git a/nodes/core/core/80-template.js b/nodes/core/core/80-template.js
index 9c818dcec..7c84142d2 100644
--- a/nodes/core/core/80-template.js
+++ b/nodes/core/core/80-template.js
@@ -17,7 +17,6 @@
 module.exports = function(RED) {
     "use strict";
     var mustache = require("mustache");
-    var fs = require('fs');
 
     function TemplateNode(n) {
         RED.nodes.createNode(this,n);
diff --git a/nodes/core/hardware/36-rpi-gpio.js b/nodes/core/hardware/36-rpi-gpio.js
index a22a12957..93cbc4e00 100644
--- a/nodes/core/hardware/36-rpi-gpio.js
+++ b/nodes/core/hardware/36-rpi-gpio.js
@@ -179,9 +179,7 @@ module.exports = function(RED) {
     RED.nodes.registerType("rpi-gpio in",GPIOInNode);
     RED.nodes.registerType("rpi-gpio out",GPIOOutNode);
 
-    var querystring = require('querystring');
     RED.httpAdmin.get('/rpi-gpio/:id',function(req,res) {
-        var credentials = RED.nodes.getCredentials(req.params.id);
         res.send( JSON.stringify(pitype) );
     });
 }
diff --git a/nodes/core/storage/28-tail.js b/nodes/core/storage/28-tail.js
index c986fd8fd..89c7a6399 100644
--- a/nodes/core/storage/28-tail.js
+++ b/nodes/core/storage/28-tail.js
@@ -16,7 +16,6 @@
 
 module.exports = function(RED) {
     "use strict";
-    var fs = require("fs");
     var spawn = require('child_process').spawn;
     var plat = require('os').platform();