ui-tree: make blob viewer generate valid html

A leftover '</td></tr>' made ui-tree generate invalid html for blob
content. Fix it.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

ui-tree.c

@@ -47,7 +47,6 @@ static void print_object(const unsigned char *sha1, char *path)
 		}
 		idx++;
 	}
-	html("\n</td></tr>\n");
 	html("</table>\n");
 }