docs: remove bogus line-height override

The default browser line height is fine. Overriding it
causes <pre> blocks inside a <dl> to have enourmous
spacing.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

docs/generic.css

@@ -9,7 +9,6 @@ body {
 p, ul, ol, dl {
   padding: 0px;
   margin: 0px;
-  line-height: 150%;
 }
 
 p {