Remove no-op link from submodule entries

Instead of linking to the current page ("href='#'"), do not add a link
to a submodule entry at all if the module-link setting is not used.

Signed-off-by: Lukas Fleischer <cgit@cryptocrack.de>

cgit.css

@@ -254,7 +254,7 @@ div#cgit div.error {
 	margin: 1em 2em;
 }
 
-div#cgit a.ls-blob, div#cgit a.ls-dir, div#cgit a.ls-mod {
+div#cgit a.ls-blob, div#cgit a.ls-dir, div#cgit .ls-mod {
 	font-family: monospace;
 }