Remove obsolete CSS file

static/css/pioneer/main.css

@@ -1,161 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-@font-face {
-  font-family: 'Fira Sans';
-  src:
-    local("Fira Sans"),
-    local("Fira Sans Regular"),
-    url("../../fonts/fira/woff2/FiraSans-Regular.woff2") format("woff2"),
-    url("../../fonts/fira/woff/FiraSans-Regular.woff") format("woff"),
-    url("../../fonts/fira/otf/FiraSans-Regular.otf") format("opentype");
-  font-weight: 400;
-  font-style: normal;
-}
-
-@font-face {
-  font-family: 'Fira Sans';
-  src:
-    local("Fira Sans Bold"),
-    url("../../fonts/fira/woff2/FiraSans-Bold.woff2") format("woff2"),
-    url("../../fonts/fira/woff/FiraSans-Bold.woff") format("woff"),
-    url("../../fonts/fira/otf/FiraSans-Bold.otf") format("opentype");
-  font-weight: 600;
-  font-style: normal;
-}
-
-* {
-  box-sizing: border-box;
-}
-
-html,
-body {
-  min-height: 100%;
-  min-width: 100%;
-  margin: 0;
-  padding: 0;
-}
-
-html {
-  font-size: 62.5%;
-}
-
-body {
-  font-family: Fira Sans, sans-serif;
-  font-size: 1.6rem;
-  line-height: 2.2rem;
-
-  background-color: #1e4488;
-  background-image: radial-gradient(ellipse 250% 100% at center 140%,#737ffd 0,#0065b8 50%,#1e4488 100%);
-  color: #fff;
-}
-
-a {
-  color: #fff;
-}
-
-.page-container {
-  background-attachment: fixed;
-  background-image: url("../../img/pioneer/stars.png");
-  background-size: 1180px 346px;
-  background-position: top;
-  background-repeat: no-repeat;
-}
-
-@media
-(min-device-pixel-ratio: 2),
-(min-resolution: 192dpi) {
-  .page-container {
-    background-image: url("../../img/pioneer/stars@2x.png");
-  }
-}
-
-.wordmark {
-  height: 70px;
-}
-
-.header {
-  margin: 20px 0 10px;
-}
-
-.layout-wrapper {
-  max-width: 960px;
-  padding: 0 20px;
-  margin: 0 auto;
-}
-
-.banner {
-  background: hsla(0,0%,100%,.05);
-  box-shadow: inset 0 -4px 0 hsla(0,0%,100%,.05),0 1px 0 rgba(0,0,0,.1);
-}
-
-.banner .layout-wrapper {
-  display: flex;
-  flex-direction: row;
-  padding: 15px;
-  align-items: center;
-}
-
-.banner .icon-container {
-  flex: 0 0 auto;
-}
-
-.banner .icon {
-  height: 66px;
-  vertical-align: middle;
-}
-
-.banner .banner-text {
-  margin: 0;
-  flex: 1;
-  line-height: 45px;
-}
-
-.program-header {
-  margin: 40px 0 15px;
-}
-
-.footer {
-  text-align: center;
-  margin: 100px 0;
-}
-
-.mozilla-logo {
-  max-width: 200px;
-}
-
-.enroll-button {
-  background: #57bd35;
-  color: #fff;
-  border: 1px solid #40a624;
-  padding: 24px 12px;
-  width: 320px;
-  text-align: center;
-  font-weight: 500;
-  margin: 40px auto 0;
-  display: block;
-  font-size: 23px;
-  cursor: pointer;
-  text-decoration: none;
-}
-
-.enroll-button:hover {
-  background: #40a624;
-  border: 1px solid #399320;
-}
-
-.enroll-button:active {
-  background: #399320;
-  border: 1px solid #2e761a;
-}
-
-.enroll-button.enrolled {
-  background: none;
-  border: none;
-  cursor: default;
-}
-
-a:visited {
-  color: #f9f9f9;
-}