remove StandardToken (unnecessary duplicate effort)

contracts/examples/StandardToken.sol

@@ -1,42 +0,0 @@
-pragma solidity ^0.5.0;
-
-import "zos-lib/contracts/Initializable.sol";
-import "../token/ERC20/ERC20Detailed.sol";
-import "../token/ERC20/ERC20Mintable.sol";
-import "../token/ERC20/ERC20Pausable.sol";
-
-
-/**
- * @title Standard ERC20 token, with minting and pause functionality.
- *
- */
-contract StandardToken is Initializable, ERC20Detailed, ERC20Mintable, ERC20Pausable {
-    function initialize(
-        string memory name, string memory symbol, uint8 decimals, uint256 initialSupply, address initialHolder, 
-        address[] memory minters, address[] memory pausers, address sender
-    ) public initializer {
-        ERC20Detailed.initialize(name, symbol, decimals);
-
-        // Mint the initial supply
-        if (initialSupply > 0) { // To allow passing a null address when not doing any initial supply
-            _mint(initialHolder, initialSupply);
-        }
-
-        // Initialize the minter and pauser roles, and renounce them
-        ERC20Mintable.initialize(sender);
-        _removeMinter(sender);
-
-        ERC20Pausable.initialize(sender);
-        _removePauser(sender);
-
-        // Add the requested minters and pausers (this can be done after renouncing since
-        // these are the internal calls)
-        for (uint256 i = 0; i < minters.length; ++i) {
-            _addMinter(minters[i]);
-        }
-
-        for (uint256 i = 0; i < pausers.length; ++i) {
-            _addPauser(pausers[i]);
-        }
-    }
-}