Removed unused code

packages/apputils-extension/style/splash.css

@@ -5,7 +5,7 @@
 |----------------------------------------------------------------------------*/
 
 #jupyterlab-splash {
-  z-index: 1000;
+  z-index: 10;
   position: absolute;
   overflow: hidden;
   width: 100%;
@@ -119,23 +119,24 @@ top: auto;
 bottom: 0;
 }
 
-@-webkit-keyframes sk-rotate { 100% { -webkit-transform: rotate(360deg) }}
-@keyframes sk-rotate { 100% { transform: rotate(360deg); -webkit-transform: rotate(360deg) }}
 
 @-webkit-keyframes sk-bounce {
-0%, 100% { -webkit-transform: scale(0.0) }
-50% { -webkit-transform: scale(1.0) }
+  0%, 100% { -webkit-transform: scale(0.0) }
+  50% { -webkit-transform: scale(1.0) }
 }
 
+
 @keyframes sk-bounce {
-0%, 100% { 
-  transform: scale(0.0);
-  -webkit-transform: scale(0.0);
-} 50% { 
-  transform: scale(1.0);
-  -webkit-transform: scale(1.0);
-}
+  0%, 100% { 
+    transform: scale(0.0);
+    -webkit-transform: scale(0.0);
+  } 50% { 
+    transform: scale(1.0);
+    -webkit-transform: scale(1.0);
+  }
 }
+
+
 @keyframes orbit {
   0% {
       transform: rotateZ(0deg);