Remove unneeded stylsheet

assets/css/main.css

@@ -1,42 +0,0 @@
-body {
-    font: normal 12px "Trebuchet MS", Arial, sans-serif;
-}
-
-html, body {
-    margin: 0;
-    padding: 0;
-    border: 0 none;
-    overflow: hidden;
-    height: 100%;
-    width: 100%;
-}
-
-a {
-    color: #4b6b94;
-    text-decoration: none;
-}
-
-a:hover {
-    color: #999;
-    text-decoration: underline;
-}
-
-#header {
-    height: 46px;
-}
-
-.x-viewport body {
-    background: #F5F9FE url('../images/back.png') repeat-x !important;
-}
-
-.x-tree-node-el {
-    padding: 2px;
-}
-
-.x-tree-node-icon {
-    height: 16px !important;
-}
-
-.x-form-display-field {
-    color: #777;
-}