Remove the Dromaeo and TodoMVC samples.

samples/third_party/todomvc_performance/web/app/app.css

-/* base.css overrides */
-
-html,
-body {
-  margin: 0;
-  padding: 0;
-}
-
-body {
-  font: 14px 'Helvetica Neue', Helvetica, Arial, sans-serif;
-  line-height: 1.4em;
-  background: #eaeaea url('bg.png');
-  color: #4d4d4d;
-  width: 550px;
-  margin: 0 auto;
-  -webkit-font-smoothing: antialiased;
-  -moz-font-smoothing: antialiased;
-  -ms-font-smoothing: antialiased;
-  -o-font-smoothing: antialiased;
-  font-smoothing: antialiased;
-}
-
-body > header {
-  padding-top: 22px;
-  margin-bottom: -5px;
-}
-
-h1 {
-  /*  position: absolute;
-  top: -120px;*/
-  width: 100%;
-  font-size: 70px;
-  font-weight: bold;
-  text-align: center;
-  color: #b3b3b3;
-  color: rgba(255, 255, 255, 0.3);
-  text-shadow: -1px -1px rgba(0, 0, 0, 0.2);
-  -webkit-text-rendering: optimizeLegibility;
-  -moz-text-rendering: optimizeLegibility;
-  -ms-text-rendering: optimizeLegibility;
-  -o-text-rendering: optimizeLegibility;
-  text-rendering: optimizeLegibility;
-}
-
-#info {
-  margin: 65px auto 0;
-  color: #a6a6a6;
-  font-size: 12px;
-  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.7);
-  text-align: center;
-}
-
-#info a {
-  color: inherit;
-}
-
-.hidden{
-  display:none;
-}
-
-hr {
-  margin: 20px 0;
-  border: 0;
-  border-top: 1px dashed #C5C5C5;
-  border-bottom: 1px dashed #F7F7F7;
-}
-
-.learn a {
-  font-weight: normal;
-  text-decoration: none;
-  color: #b83f45;
-}
-
-.learn a:hover {
-  text-decoration: underline;
-  color: #787e7e;
-}
-
-.learn h3,
-.learn h4,
-.learn h5 {
-  margin: 10px 0;
-  font-weight: 500;
-  line-height: 1.2;
-  color: #000;
-}
-
-.learn h3 {
-  font-size: 24px;
-}
-
-.learn h4 {
-  font-size: 18px;
-}
-
-.learn h5 {
-  margin-bottom: 0;
-  font-size: 14px;
-}
-
-.learn ul {
-  padding: 0;
-  margin: 0 0 30px 25px;
-}
-
-.learn li {
-  line-height: 20px;
-}
-
-.learn p {
-  font-size: 15px;
-  font-weight: 300;
-  line-height: 1.3;
-  margin-top: 0;
-  margin-bottom: 0;
-}
-
-.quote {
-  border: none;
-  margin: 20px 0 60px 0;
-}
-
-.quote p {
-  font-style: italic;
-}
-
-.quote p:before {
-  content: '“';
-  font-size: 50px;
-  opacity: .15;
-  position: absolute;
-  top: -20px;
-  left: 3px;
-}
-
-.quote p:after {
-  content: '”';
-  font-size: 50px;
-  opacity: .15;
-  position: absolute;
-  bottom: -42px;
-  right: 3px;
-}
-
-.quote footer {
-  position: absolute;
-  bottom: -40px;
-  right: 0;
-}
-
-.quote footer img {
-  border-radius: 3px;
-}
-
-.quote footer a {
-  margin-left: 5px;
-  vertical-align: middle;
-}
-
-.speech-bubble {
-  position: relative;
-  padding: 10px;
-  background: rgba(0, 0, 0, .04);
-  border-radius: 5px;
-}
-
-.speech-bubble:after {
-  content: '';
-  position: absolute;
-  top: 100%;
-  right: 30px;
-  border: 13px solid transparent;
-  border-top-color: rgba(0, 0, 0, .04);
-}
-
-/**body*/.learn-bar > .learn {
-  position: absolute;
-  width: 272px;
-  top: 8px;
-  left: -300px;
-  padding: 10px;
-  border-radius: 5px;
-  background-color: rgba(255, 255, 255, .6);
-  transition-property: left;
-  transition-duration: 500ms;
-}
-
-
-/* IE doesn't support the hidden attribute */
-[hidden] {
-  display: none;
-}
-
-@media (min-width: 899px) {
-  /**body*/.learn-bar {
-    width: auto;
-    margin: 0 0 0 300px;
-  }
-  /**body*/.learn-bar > .learn {
-    left: 8px;
-  }
-  /**body*/.learn-bar #todoapp {
-    width: 550px;
-    margin: 130px auto 40px auto;
-  }
-}