fix eslint errors

Author: straker

build/build-manual.js

@@ -1,6 +1,3 @@
-/*eslint-env node */
-'use strict';
-
 var path = require('path');
 var templates = require('./templates');
 

build/configure.js

@@ -1,7 +1,4 @@
-/*eslint-env node */
 /*eslint max-len: off */
-'use strict';
-
 var clone = require('clone');
 var doT = require('@deque/dot');
 var templates = require('./templates');

build/tasks/add-locale.js

@@ -1,5 +1,3 @@
-/*eslint-env node */
-'use strict';
 var clone = require('clone');
 var buildManual = require('../build-manual');
 

build/tasks/aria-supported.js

@@ -1,6 +1,3 @@
-/*eslint-env node */
-'use strict';
-
 const { roles, aria: props } = require('aria-query');
 const format = require('../shared/format');
 

build/tasks/configure.js

@@ -1,5 +1,3 @@
-/*eslint-env node */
-'use strict';
 const buildRules = require('../configure');
 const format = require('../shared/format');
 

build/tasks/langs.js

@@ -1,5 +1,3 @@
-/*eslint-env node */
-'use strict';
 var http = require('http');
 module.exports = function (grunt) {
   function getLine(data, start) {

build/tasks/notify.js

@@ -1,8 +1,5 @@
 const { notify } = require('node-notifier');
 
-/*eslint-env node */
-('use strict');
-
 module.exports = function (grunt) {
   grunt.registerMultiTask(
     'notify',

build/tasks/test.js

@@ -1,9 +1,6 @@
 const execSync = require('child_process').execSync;
 const chalk = require('chalk');
 
-/*eslint-env node */
-('use strict');
-
 module.exports = function (grunt) {
   grunt.registerMultiTask(
     'test',

build/tasks/update-help.js

@@ -1,6 +1,3 @@
-/*eslint-env node */
-'use strict';
-
 module.exports = function (grunt) {
   grunt.registerMultiTask(
     'update-help',

build/tasks/validate.js

@@ -1,6 +1,3 @@
-/*eslint-env node */
-'use strict';
-
 var revalidator = require('revalidator').validate,
   fs = require('fs'),
   path = require('path');