Remove redundant CSS selectors
Remove redundant CSS selectors

Both are covered by rules in `commonltr.css`:

    .note .notetitle,
    .note .notelisttitle,
    .note .note__title {
      font-weight: bold;
    }

Signed-off-by: Roger Sheen <a61a1add71dadc74037ae5e44ee30713db9a7451@infotexture.net>

infotexture/docs,dita-ot/docs,infotexture/docs