Remove old gulp file and fix minor error in README.

README.md

@@ -596,7 +596,7 @@ Node.js software you need. To install them run:
 
         npm run lint-theme
         npm run lint-project
-        nmp run list (project + theme)
+        nmp run lint (project + theme)
 
 
 ## Getting help

gulpfile.js

@@ -1,83 +0,0 @@
-'use strict';
-
-var options = {};
-
-// #############################
-// Edit these paths and options.
-// #############################
-
-// The root paths are used to construct all the other paths in this
-// configuration.
-options.rootPath = {
-  projectAssets : '../../assets/',
-  themeAssets   : __dirname + '/assets/'
-};
-
-options.path = {
-  sass : [
-    options.rootPath.themeAssets + 'sass/**/*.scss',
-    options.rootPath.projectAssets + 'sass/**/*.scss'
-  ],
-  js : [
-    options.rootPath.themeAssets + 'js/**/*.js',
-    options.rootPath.projectAssets + 'js/**/*.js'
-  ]
-};
-
-// If your files are on a network share, you may want to turn on polling for
-// Gulp watch. Since polling is less efficient, we disable polling by default.
-options.gulpWatchOptions = {interval: 600};
-// options.gulpWatchOptions = {interval: 1000, mode: 'poll'};
-
-// Load Gulp and tools we will use.
-var gulp = require('gulp');
-var $    = require('gulp-load-plugins')();
-
-// Lint JavaScript.
-gulp.task('lint:js', function lint () {
-  return gulp.src(options.path.js)
-    .pipe($.eslint())
-    .pipe($.eslint.format());
-});
-
-// Lint JavaScript and throw an error for a CI to catch.
-gulp.task('lint:js-with-fail', function lint () {
-  return gulp.src(options.path.js)
-    .pipe($.eslint())
-    .pipe($.eslint.format())
-    .pipe($.eslint.failOnError());
-});
-
-// Lint Sass.
-gulp.task('lint:sass', function lint () {
-  return gulp.src(options.path.sass)
-    .pipe($.sassLint())
-    .pipe($.sassLint.format());
-});
-
-// Lint Sass and throw an error for a CI to catch.
-gulp.task('lint:sass-with-fail', function lint () {
-  return gulp.src(options.path.sass)
-    .pipe($.sassLint())
-    .pipe($.sassLint.format())
-    .pipe($.sassLint.failOnError());
-});
-
-// Lint Sass and JavaScript.
-gulp.task('lint', gulp.parallel('lint:sass', 'lint:js'));
-
-// Watch for changes and rebuild.
-gulp.task('watch:lint:sass', gulp.series('lint:sass', function watch () {
-  return gulp.watch(options.path.sass, options.gulpWatchOptions, gulp.series('lint:sass'));
-}));
-
-gulp.task('watch:lint:js', gulp.series('lint:js', function watch () {
-  return gulp.watch(options.path.js, options.gulpWatchOptions, gulp.series('lint:js'));
-}));
-
-gulp.task('watch:lint', gulp.parallel('watch:lint:sass', 'watch:lint:js'));
-
-gulp.task('watch', gulp.series('watch:lint'));
-
-// The default task.
-gulp.task('default', gulp.series('lint'));