arrange erc721 && erc1155

contracts/intf/IERC165.sol

@@ -1,25 +0,0 @@
-// This is a file copied from https://github.com/OpenZeppelin/openzeppelin-contracts/blob/solc-0.6/contracts/introspection/IERC165.sol
-// SPDX-License-Identifier: MIT
-
-pragma solidity 0.6.9;
-
-/**
- * @dev Interface of the ERC165 standard, as defined in the
- * https://eips.ethereum.org/EIPS/eip-165[EIP].
- *
- * Implementers can declare support of contract interfaces, which can then be
- * queried by others ({ERC165Checker}).
- *
- * For an implementation, see {ERC165}.
- */
-interface IERC165 {
-    /**
-     * @dev Returns true if this contract implements the interface defined by
-     * `interfaceId`. See the corresponding
-     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
-     * to learn more about how these ids are created.
-     *
-     * This function call must use less than 30 000 gas.
-     */
-    function supportsInterface(bytes4 interfaceId) external view returns (bool);
-}