pragma solidity ^0.5.2;

interface BurnableERC20 {
    function balanceOf(address who) external view returns (uint);
    function burn(uint256 amount) external;
}

contract Burner {
    BurnableERC20 public token;

    constructor(BurnableERC20 _token) public {
        token = _token;
    }

    function burn() external {
        uint balance = token.balanceOf(address(this));
        token.burn(balance);
    }
}

{
  "compilationTarget": {
    "Burner.sol": "Burner"
  },
  "evmVersion": "byzantium",
  "libraries": {},
  "optimizer": {
    "enabled": false,
    "runs": 0
  },
  "remappings": []
}