removed inline documentation (#624)

assets/sass/app.scss

@@ -37,5 +37,4 @@ footer.main-footer {
 @import 'calendar';
 @import 'dashboard';
 @import 'navbar';
-@import 'documentation';
 @import 'daterangepicker';

assets/sass/documentation.scss

@@ -1,25 +0,0 @@
-/*
- * This file is part of the Kimai time-tracking app.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-.markdown-body {
-    h1, h2, h3, h4, h5, h6 {
-        a.anchor {
-            float: left;
-            font-size: 0.5em;
-            margin-left: -1em;
-            padding-top: 0.5em;
-            color: $text-color;
-            display: none;
-        }
-    }
-}
-
-@media (min-width: $screen-sm-min) {
-    .markdown-body {
-        padding-left: 25px;
-    }
-}