Remove unused pause

contracts/erc20/contracts/test/UntransferrableDummyERC20Token.sol

@@ -25,8 +25,6 @@ import "./DummyERC20Token.sol";
 contract UntransferrableDummyERC20Token is
     DummyERC20Token
 {
-    bool internal _paused;
-
     constructor (
         string memory _name,
         string memory _symbol,

packages/contract-wrappers/test/exchange_wrapper_test.ts

@@ -22,7 +22,7 @@ chaiSetup.configure();
 const expect = chai.expect;
 const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
 
-describe.only('ExchangeWrapper', () => {
+describe('ExchangeWrapper', () => {
     let contractWrappers: ContractWrappers;
     let userAddresses: string[];
     let zrxTokenAddress: string;