Revert "Commit updated Javascript packages"

This reverts commit a88734348a.

build/javascript/node_modules/tabbable/karma.conf.js

@@ -1,27 +0,0 @@
-module.exports = function(config) {
-  config.set({
-    basePath: '',
-    frameworks: ['browserify', 'mocha'],
-    files: [
-      'test/**/*.test.js',
-    ],
-    preprocessors: {
-      'test/**/*.test.js': ['browserify'],
-    },
-    browserify: {
-      debug: true,
-      transform: ['brfs'],
-    },
-    mochaReporter: {
-      showDiff: true,
-    },
-    reporters: ['mocha'],
-    port: 9876,
-    colors: true,
-    logLevel: config.LOG_INFO,
-    autoWatch: true,
-    browsers: ['Firefox'],
-    singleRun: true,
-    concurrency: Infinity,
-  });
-}