Update msdos.html

msdos.html

@@ -44,7 +44,6 @@ button {
     border-image: initial;
 }
 
-.dosbox-container{position:fixed;top:0;left:0;}
 
 @-webkit-keyframes blinker {
         0% { visibility: visible; }
@@ -65,8 +64,7 @@ button {
       }
 
 html{overflow:hidden}
-.dosbox-loader,.dosbox-powered{display:none}
-.dosbox-overlay{background:transparent}
+.dosbox-overlay{display:none}
   </style>
 </head>