Move node-sass to npm script and drop Ruby Sass.

grunt/bs-sass-compile/libsass.js

@@ -1,33 +0,0 @@
-// Compile Bootstrap with [libsass][1] using [grunt-sass][2]
-// [1]: https://github.com/sass/libsass
-// [2]: https://github.com/sindresorhus/grunt-sass
-module.exports = function configureLibsass(grunt) {
-  grunt.config.merge({
-    sass: {
-      options: {
-        includePaths: ['scss'],
-        precision: 6,
-        sourceComments: false,
-        sourceMap: true,
-        outputStyle: 'expanded'
-      },
-      core: {
-        files: {
-          'dist/css/<%= pkg.name %>.css': 'scss/<%= pkg.name %>.scss'
-        }
-      },
-      extras: {
-        files: {
-          'dist/css/<%= pkg.name %>-grid.css': 'scss/<%= pkg.name %>-grid.scss',
-          'dist/css/<%= pkg.name %>-reboot.css': 'scss/<%= pkg.name %>-reboot.scss'
-        }
-      },
-      docs: {
-        files: {
-          'docs/assets/css/docs.min.css': 'docs/assets/scss/docs.scss'
-        }
-      }
-    }
-  })
-  grunt.loadNpmTasks('grunt-sass')
-}

grunt/bs-sass-compile/sass.js

@@ -1,37 +0,0 @@
-// Compile Bootstrap with [Ruby Sass][1] using [grunt-contrib-sass][2]
-// [1]: https://github.com/sass/sass
-// [2]: https://github.com/gruntjs/grunt-contrib-sass
-module.exports = function configureRubySass(grunt) {
-  var options = {
-    loadPath: ['scss'],
-    precision: 6,
-    sourcemap: 'auto',
-    style: 'expanded',
-    trace: true,
-    bundleExec: true
-  }
-  grunt.config.merge({
-    sass: {
-      core: {
-        options: options,
-        files: {
-          'dist/css/<%= pkg.name %>.css': 'scss/<%= pkg.name %>.scss'
-        }
-      },
-      extras: {
-        options: options,
-        files: {
-          'dist/css/<%= pkg.name %>-grid.css': 'scss/<%= pkg.name %>-grid.scss',
-          'dist/css/<%= pkg.name %>-reboot.css': 'scss/<%= pkg.name %>-reboot.scss'
-        }
-      },
-      docs: {
-        options: options,
-        files: {
-          'docs/assets/css/docs.min.css': 'docs/assets/scss/docs.scss'
-        }
-      }
-    }
-  })
-  grunt.loadNpmTasks('grunt-contrib-sass')
-}