Final tweaks to Bombe svg and preloader css

src/web/static/images/bombe.svg

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-	Turing-Welchman Bombe SVG animation
+    Turing-Welchman Bombe SVG animation
 
-	@author n1474335 [n1474335@gmail.com]
+    @author n1474335 [n1474335@gmail.com]
     @copyright Crown Copyright 2019
     @license Apache-2.0
 -->

src/web/stylesheets/preloader.css

@@ -160,12 +160,3 @@
         transform: translate3d(0, 200px, 0);
     }
 }
-
-@keyframes fadeIn {
-    from {
-        opacity: 0;
-    }
-    to {
-        opacity: 1;
-    }
-}