Remove unused vars and add jshint checking

.jshintrc

@@ -45,6 +45,7 @@
     "plusplus": false,
     "regexp": false,
     "undef": true,
+    "unused": true,
     "sub": true,
     "strict": false,
     "white": false

lib/handlebars/compiler/ast.js

@@ -1,5 +1,3 @@
-import Exception from "../exception";
-
 var AST = {
   Program: function(statements, blockParams, strip, locInfo) {
     this.loc = locInfo;

lib/handlebars/compiler/compiler.js

@@ -18,8 +18,6 @@ function scopedId(path) {
 // an ID is simple if it only has one part, and that part is not
 // `..` or `this`.
 function simpleId(path) {
-  var part = path.parts[0];
-
   return path.parts.length === 1 && !scopedId(path) && !path.depth;
 }
 
@@ -93,7 +91,7 @@ Compiler.prototype = {
 
   compileProgram: function(program) {
     var result = new this.compiler().compile(program, this.options);
-    var guid = this.guid++, depth;
+    var guid = this.guid++;
 
     this.usePartial = this.usePartial || result.usePartial;
 

lib/handlebars/compiler/javascript-compiler.js

@@ -755,7 +755,6 @@ JavaScriptCompiler.prototype = {
 
   replaceStack: function(callback) {
     var prefix = ['('],
-        inline = this.isInline(),
         stack,
         createdStack,
         usedLiteral;

lib/handlebars/compiler/printer.js

@@ -127,7 +127,7 @@ PrintVisitor.prototype.BooleanLiteral = function(bool) {
 
 PrintVisitor.prototype.Hash = function(hash) {
   var pairs = hash.pairs;
-  var joinedPairs = [], left, right;
+  var joinedPairs = [];
 
   for (var i=0, l=pairs.length; i<l; i++) {
     joinedPairs.push(this.accept(pairs[i]));

lib/handlebars/compiler/visitor.js

@@ -1,3 +1,4 @@
+/*jshint unused: false */
 function Visitor() {}
 
 Visitor.prototype = {

lib/handlebars/utils.js

@@ -1,6 +1,4 @@
 /*jshint -W004 */
-import SafeString from "./safe-string";
-
 var escape = {
   "&": "&",
   "<": "&lt;",

lib/precompiler.js

@@ -13,7 +13,6 @@ module.exports.cli = function(opts) {
     return;
   }
 
-  var template = [0];
   if (!opts.templates.length) {
     throw new Handlebars.Exception('Must define at least one template or directory.');
   }