Merge pull request #211 from paritytech/fix/marketplace-docs

Remove outdated text from marketplace pallet

pallets/marketplace/README.md

@@ -8,8 +8,6 @@ Users who own NFTs have the ability to create 'Asks' to offer their items to pot
 
 In the event that a user desires an item that is not currently available for sale, they can initiate a 'Bid' by specifying the price they are willing to pay for the item. The amount pledged in the Bid is then locked from the user's balance.
 
-Additionally, users have the option to set up an 'exchange,' where they can list the items they own for sale. Any profits generated from selling these items can automatically fund Ask purchases.
-
 Both buyer and seller must pay fees for the operations that take place in the marketplace. This fees must be approved by the `FeeSigner` role, this approval is done by appending the signature of the FeeSigner in the creation of orders. Then the fees are payed to the `PayoutAddress` account configured inside the pallet.
 
 ## Dispatchable Functions
@@ -19,8 +17,3 @@ Both buyer and seller must pay fees for the operations that take place in the ma
 -   `set_payout_address()`: Allows authority account to set the payout address.
 -   `create_order()`: Create Ask or Bid Order on an specific NFT (collectionId, ItemId). If orders match the transaction is executed.
 -   `cancel_order()`: Cancelation of Ask or Bid order.
--   `create_exchange()`: Create an exchange with the NFTs that the user is looking to sell and the NFTs it's looking to buy with the profit of the sale.
--   `fill_suggestion()`: Allows users to participate in the purchase of a suggestion inside an exchange.
--   `execute_exchange()`: Trade suggested items with bidders that filled the suggestions and purchase the wantAsks.
--   `cancel_suggestion()`: Cancel an already filled suggestion.
--   `cancel_exchange()`: Cancels existing exchange marking it as closed