build: remove dashboard (#14023)

* Since we going to move from Travis to CircleCI we don't want to use the dashboard anymore. Since nobody has been
looking at the dashboard frequently, it just makes things more complicated and additionally we will be using
the Github robot in order to keep track of size changes.

test/karma.conf.js

@@ -13,7 +13,6 @@ module.exports = (config) => {
       require('karma-chrome-launcher'),
       require('karma-firefox-launcher'),
       require('karma-sourcemap-loader'),
-      require('karma-coverage'),
     ],
     files: [
       {pattern: 'node_modules/core-js/client/core.min.js', included: true, watched: false},
@@ -52,12 +51,6 @@ module.exports = (config) => {
     reporters: ['dots'],
     autoWatch: false,
 
-    coverageReporter: {
-      type : 'json-summary',
-      dir : 'dist/coverage/',
-      subdir: '.'
-    },
-
     sauceLabs: {
       testName: 'Angular Material Unit Tests',
       startConnect: false,
@@ -124,13 +117,6 @@ module.exports = (config) => {
   if (process.env['TRAVIS']) {
     const buildId = `TRAVIS #${process.env.TRAVIS_BUILD_NUMBER} (${process.env.TRAVIS_BUILD_ID})`;
 
-    if (process.env['TRAVIS_PULL_REQUEST'] === 'false' &&
-        process.env['MODE'] === "travis_required") {
-
-      config.preprocessors['dist/packages/**/!(*+(.|-)spec).js'] = ['coverage'];
-      config.reporters.push('coverage');
-    }
-
     // The MODE variable is the indicator of what row in the test matrix we're running.
     // It will look like <platform>_<target>, where platform is one of 'saucelabs', 'browserstack'
     // or 'travis'. The target is a reference to different collections of browsers that can run