暂时移除 gulp-sourcemaps，以下 �issues 解决之后再考虑

weixin/gulp-lazyimagecss#1

Author: hzlzh

_tasks/TaskBuildDev.js

@@ -10,7 +10,6 @@ var postcss = require('gulp-postcss');   // CSS 预处理
 var postcssPxtorem = require('postcss-pxtorem'); // CSS 转换 `px` 为 `rem`
 var posthtml = require('gulp-posthtml');  // HTML 预处理
 var posthtmlPx2rem = require('posthtml-px2rem');  // HTML 内联 CSS 转换 `px` 为 `rem`
-var sourcemaps = require('gulp-sourcemaps');  // 添加 LESS SourceMaps 调试支持
 
 var paths = {
     src: {
@@ -76,7 +75,6 @@ module.exports = function (gulp, config) {
     //编译 less
     function compileLess() {
         return gulp.src(paths.src.less)
-            .pipe(sourcemaps.init()) // sourcemaps 初始化
             .pipe(less())
             .on('error', function (error) {
                 console.log(error.message);
@@ -91,7 +89,6 @@ module.exports = function (gulp, config) {
                     })
                 ])
             ))
-            .pipe(sourcemaps.write())  // sourcemaps 写入
             .pipe(lazyImageCSS({imagePath: lazyDir}))
             .pipe(gulp.dest(paths.dev.css))
             .on('data', function () {

package.json

@@ -20,7 +20,6 @@
     "gulp-rev-all": "^0.8.22",
     "gulp-rev-delete-original": "^0.1.0",
     "gulp-tmtsprite": "^0.0.20",
-    "gulp-sourcemaps": "^1.6.0",
     "gulp-uglify": "^1.5.3",
     "gulp-usemin2": "^0.2.4",
     "gulp-util": "^3.0.7",