The master branch does not need the styles.css.

The css is generated with gulp, so it's not needed. But I'm not adding
it to .gitignore here as it's needed on the `gh-pages` branch.

css/style.css

@@ -1,86 +0,0 @@
-.popover {
-  padding: 0; }
-  .popover.bottom > .arrow {
-    border-bottom-color: #000; }
-    .popover.bottom > .arrow:after {
-      border-bottom-color: #f7f7f7; }
-
-.popover-content {
-  padding: 10px 24px; }
-
-.popover-title.menu-tabs {
-  padding: .5rem .5rem 0;
-  display: block; }
-
-.popover-title.menu-button-group {
-  display: none; }
-
-.popover-title.menu-tabs .nav-tabs {
-  position: relative;
-  top: 1px; }
-
-.popover-actions {
-  padding: 8px 14px;
-  margin: 0;
-  font-size: 14px;
-  background-color: #f7f7f7;
-  border-top: 1px solid #ebebeb;
-  border-radius: 0 0 5px 5px;
-  text-align: right; }
-
-.select2-container {
-  z-index: 100000; }
-
-.scancode--explanation {
-  color: lightgray;
-  float: right; }
-
-.layout-abbreviation {
-  font-weight: bold;
-  color: #FFF;
-  background: #333;
-  padding: 4px 8px;
-  font-family: monospace;
-  margin-right: .5em; }
-
-.layout-preview img {
-  max-width: 100%;
-  margin-top: 10px; }
-
-.key-editor--none__description p {
-  padding: 2rem 0;
-  margin: 0;
-  text-align: center; }
-
-.select2-item {
-  position: relative;
-  font-size: 1.5rem; }
-  .select2-item.keymap-name--wrapper {
-    padding-left: 50px; }
-  .select2-item .layout-segment-code {
-    height: 2rem;
-    position: absolute;
-    left: 0;
-    top: 50%;
-    margin-top: -1rem; }
-
-.preview-wrapper img {
-  max-width: 100%; }
-
-.global-key-setup.disabled {
-  opacity: 0; }
-  .global-key-setup.disabled .setting-label {
-    color: #999; }
-
-.setting-label.disabled {
-  color: #999; }
-
-.global-key-setup--wrapper {
-  position: relative; }
-  .global-key-setup--wrapper .disabled-state--text {
-    position: absolute;
-    top: 50%;
-    margin-top: -4rem; }
-
-.mouse__action--type {
-  border-right: 1px solid #000; }