Update adminstyle.css

Removed background image since it is not published to assets resulting in 404 errors. It serves no real visual purpose, so removing the line is easier than getting the image published.

styles/blobblueish/adminstyle.css

@@ -99,7 +99,7 @@ legend {
     background: #C4C4C4;
     border-top: 2px solid #C9EF50;
     border-bottom: 2px solid #6a8b03;
-    background-image: url(bkgmaintitle.gif);
+    /*background-image: url(bkgmaintitle.gif);*/
     background-repeat: repeat-x;
     width:100%;
 }