Nuke grunt-line-remover.

Use concat's process function instead.

Gruntfile.js

@@ -58,17 +58,6 @@ module.exports = function (grunt) {
     },
 
     // JS build configuration
-    lineremover: {
-      es6Import: {
-        files: {
-          '<%= concat.bootstrap.dest %>': '<%= concat.bootstrap.dest %>'
-        },
-        options: {
-          exclusionPattern: /^(import|export)/g
-        }
-      }
-    },
-
     babel: {
       dev: {
         options: {
@@ -159,6 +148,10 @@ module.exports = function (grunt) {
 
     concat: {
       options: {
+        // Custom function to remove all export and import statements
+        process: function (src) {
+          return src.replace(/^(export|import).*/gm, '');
+        },
         stripBanners: false
       },
       bootstrap: {
@@ -447,7 +440,7 @@ module.exports = function (grunt) {
   grunt.registerTask('test-js', ['eslint', 'jscs:core', 'jscs:test', 'jscs:grunt', 'qunit']);
 
   // JS distribution task.
-  grunt.registerTask('dist-js', ['babel:dev', 'concat', 'lineremover', 'babel:dist', 'stamp', 'uglify:core', 'commonjs']);
+  grunt.registerTask('dist-js', ['babel:dev', 'concat', 'babel:dist', 'stamp', 'uglify:core', 'commonjs']);
 
   grunt.registerTask('test-scss', ['scsslint:core']);