Cleanup cw2981-royalties

[taitruong]

With new CollectionInfo with RoyaltyInfo this should be cleanup. It may even be covered optionally covered in cw721 - TBD.

cw-nfts/contracts/cw2981-royalties/src/lib.rs

Lines 26 to 46 in e63a7bb

	// see: https://docs.opensea.io/docs/metadata-standards
	#[cw_serde]
	#[derive(Default)]
	pub struct Metadata {
	pub image: Option<String>,
	pub image_data: Option<String>,
	pub external_url: Option<String>,
	pub description: Option<String>,
	pub name: Option<String>,
	pub attributes: Option<Vec<Trait>>,
	pub background_color: Option<String>,
	pub animation_url: Option<String>,
	pub youtube_url: Option<String>,
	/// This is how much the minter takes as a cut when sold
	/// royalties are owed on this token if it is Some
	pub royalty_percentage: Option<u64>,
	/// The payment address, may be different to or the same
	/// as the minter addr
	/// question: how do we validate this?
	pub royalty_payment_address: Option<String>,
	}

[taitruong]

removed contract and solved in #156