Remove unused CSS classes for style.css (#3453)

Author: seisman

doc/_static/style.css

@@ -48,38 +48,6 @@ p {
     font-size: 4em;
 }
 
-.api-module {
-	margin-bottom: 80px;
-}
-
-.youtube-embed {
-    max-width: 600px;
-    margin-bottom: 24px;
-}
-
-.video-container {
-    position:relative;
-    padding-bottom:56.25%;
-    padding-top:30px;
-    height:0;
-    overflow:hidden;
-}
-
-.video-container iframe, .video-container object, .video-container embed {
-    position:absolute;
-    top:0;
-    left:0;
-    width:100%;
-    height:100%;
-}
-
-/*.wy-menu-vertical header, .wy-menu-vertical p.caption {*/
-    /*font-size: 90%;*/
-    /*font-weight: bold;*/
-    /*color: #eeeeee;*/
-    /*letter-spacing: 0.12em;*/
-/*}*/
-
 .wy-nav-content {
     max-width: 1000px;
 }
@@ -137,22 +105,6 @@ html.writer-html5 .rst-content dl.field-list {
     }
 }
 
-/* Style for the copy button */
-/* Safe to remove for sphinx-copybutton>0.3.1
- * https://github.com/executablebooks/sphinx-copybutton/pull/107
- */
-a.copybtn {
-    position: absolute;
-    top: .2em;
-    right: .2em;
-    width: 1.3em;
-    height: 1.3em;
-    opacity: .3;
-    transition: opacity 0.5s;
-    border: none;
-    user-select: none;
-}
-
 /* Atkinson Hyperlegible regular */
 @font-face {
     font-family: "Atkinson Hyperlegible";
@@ -189,9 +141,6 @@ a.copybtn {
 .sphx-glr-thumbcontainer {
     border: solid #d6d6d6 1px!important;
     text-align: center!important;
-}
-
-.sphx-glr-thumbcontainer {
     min-height: 240px!important;
     min-width: 180px!important;
 }