Sushi: Unnecessary function declaration in interface
The `ISushiBar` interface declares a `transfer` function.\\n```\\ninterface ISushiBar {\\n    function enter(uint256 \\_amount) external;\\n\\n    function leave(uint256 \\_share) external;\\n\\n    function totalSupply() external view returns (uint256);\\n\\n    function balanceOf(address account) external view returns (uint256);\\n\\n    function transfer(address recipient, uint256 amount)\\n        external\\n        returns (bool);\\n}\\n```\\n\\nHowever, this function is never used, so it could be removed from the interface. Other functions that the `SushiBar` provides but are not used (approve, for example) aren't part of the interface either.
Remove the `transfer` declaration from the `ISushiBar` interface.
```\\ninterface ISushiBar {\\n    function enter(uint256 \\_amount) external;\\n\\n    function leave(uint256 \\_share) external;\\n\\n    function totalSupply() external view returns (uint256);\\n\\n    function balanceOf(address account) external view returns (uint256);\\n\\n    function transfer(address recipient, uint256 amount)\\n        external\\n        returns (bool);\\n}\\n```\\n