css: only use div#cgit

Don't bother with 'body' and 'div#cgit form', since
everything is wrapped in 'div#cgit' already.
Removing these two types makes embedding even easier.

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>

cgit.css

@@ -1,9 +1,6 @@
-body, div#cgit table, div#cgit form {
+div#cgit {
 	padding: 0em;
 	margin: 0em;
-}
-
-body {
 	font-family: sans-serif;
 	font-size: 10pt;
 	color: #333;