Remove unused deployer docs configs

packages/0x.js/src/0x.ts

@@ -144,10 +144,10 @@ export class ZeroEx {
         ]);
         const artifactJSONs = _.values(artifacts);
         const abiArrays = _.map(artifactJSONs, artifact => artifact.abi);
-        const defaults = {
+        const txDefaults = {
             gasPrice: config.gasPrice,
         };
-        this._web3Wrapper = new Web3Wrapper(provider, defaults);
+        this._web3Wrapper = new Web3Wrapper(provider, txDefaults);
         _.forEach(abiArrays, abi => {
             this._web3Wrapper.abiDecoder.addABI(abi);
         });

packages/0x.js/test/global_hooks.ts

@@ -9,10 +9,10 @@ before('migrate contracts', async function() {
     // HACK: Since the migrations take longer then our global mocha timeout limit
     // we manually increase it for this before hook.
     this.timeout(20000);
-    const defaults = {
+    const txDefaults = {
         gas: devConstants.GAS_ESTIMATE,
         from: devConstants.TESTRPC_FIRST_ADDRESS,
     };
     const artifactsDir = `../migrations/artifacts/1.0.0`;
-    await runMigrationsAsync(provider, artifactsDir, defaults);
+    await runMigrationsAsync(provider, artifactsDir, txDefaults);
 });

packages/0x.js/test/utils/fill_scenarios.ts

@@ -35,7 +35,6 @@ export class FillScenarios {
         const web3Wrapper = (this._zeroEx as any)._web3Wrapper as Web3Wrapper;
         for (const token of this._tokens) {
             if (token.symbol !== 'ZRX' && token.symbol !== 'WETH') {
-                const defaults = {};
                 const dummyToken = new DummyTokenContract(
                     artifacts.DummyTokenArtifact.abi,
                     token.address,