Remove payable from Destructible constructor (#1107)

* Destructible no longer has a payable constructor.

* Fixed linter errors.

contracts/lifecycle/Destructible.sol

@@ -9,9 +9,6 @@ import "../ownership/Ownable.sol";
  * @dev Base contract that can be destroyed by owner. All funds in contract will be sent to the owner.
  */
 contract Destructible is Ownable {
-
-  constructor() public payable { }
-
   /**
    * @dev Transfers the current balance to the owner and terminates the contract.
    */

contracts/mocks/DestructibleMock.sol

@@ -0,0 +1,7 @@
+pragma solidity ^0.4.24;
+
+import "../lifecycle/Destructible.sol";
+
+contract DestructibleMock is Destructible {
+  function() payable public {}
+}