Delete: One Piece: Pirate Warriors

Delete One Piece: Pirate Warriors as it already exists with the japanese title One Piece Kaizoku Musou. And it hasn't been announced for release outside Japan yet. One Piece: Pirate Warriors has been copywrighted in America and Europe though, so it can probably be added as an alias.

Might want to go ahead and add a colon to the Japanese one, too (One Piece: Kaizoku Musou).

@Veilor: @StarFoxA: Done and done.

Also removed a bunch of "similar" titles as it's absurd to list every single Dynasty Warriors game.