"touchenter" listener is probably a no-op

[RByers]

This code listens for touchenter events, but AFAIK no browser implements such events. I'm just curious if this is needed, or could be removed from the code. I've noticed this listener on a bunch of sites when debugging chromium performance issues.

[emmettbutler]

Thanks for pointing this out. Looks like it should be removed, I wasn't aware that it's a NOOP.