Remove invalid data center test

Appears SpringCM does not return an error response on an invalid data
center anymore.

test/client.js

@@ -1,59 +1,48 @@
-const { describe, it } = require('mocha');
-const { expect } = require('chai');
-const _ = require('lodash');
-const SpringCM = require('../');
-const env = require('./env');
-
-describe('client', function () {
-  this.timeout(10000);
-
-  it('connect and close', function (done) {
-    var springCm = new SpringCM(env);
-
-    springCm.connect((err) => {
-      expect(err).to.not.exist;
-
-      springCm.close(done);
-    });
-  });
-
-  it('handles invalid clientId', function (done) {
-    var springCm = new SpringCM(_.defaults({
-      clientId: 'invalid'
-    }, env));
-
-    springCm.connect((err) => {
-      expect(err).to.be.an('error');
-      done();
-    });
-  });
-
-  it('handles invalid clientSecret', function (done) {
-    var springCm = new SpringCM(_.defaults({
-      clientSecret: 'invalid'
-    }, env));
-
-    springCm.connect((err) => {
-      expect(err).to.be.an('error');
-      done();
-    });
-  });
-
-  it('handles invalid dataCenter', function (done) {
-    var springCm = new SpringCM(_.defaults({
-      dataCenter: 'invalid'
-    }, env));
-
-    springCm.connect((err) => {
-      expect(err).to.be.an('error');
-      done();
-    });
-  });
-
-  it('runs idle tasks', function (done) {
-    var springCm = new SpringCM(env);
-    springCm.queue.push({
-      idle: 1000
-    }, 0, done);
-  });
-});
+const { describe, it } = require('mocha');
+const { expect } = require('chai');
+const _ = require('lodash');
+const SpringCM = require('../');
+const env = require('./env');
+
+describe('client', function () {
+  this.timeout(10000);
+
+  it('connect and close', function (done) {
+    var springCm = new SpringCM(env);
+
+    springCm.connect((err) => {
+      expect(err).to.not.exist;
+
+      springCm.close(done);
+    });
+  });
+
+  it('handles invalid clientId', function (done) {
+    var springCm = new SpringCM(_.defaults({
+      clientId: 'invalid'
+    }, env));
+
+    springCm.connect((err) => {
+      expect(err).to.be.an('error');
+      done();
+    });
+  });
+
+  it('handles invalid clientSecret', function (done) {
+    var springCm = new SpringCM(_.defaults({
+      clientSecret: 'invalid'
+    }, env));
+
+    springCm.connect((err) => {
+      expect(err).to.be.an('error');
+      done();
+    });
+  });
+
+  it('runs idle tasks', function (done) {
+    var springCm = new SpringCM(env);
+    springCm.queue.push({
+      idle: 1000
+    }, 0, done);
+  });
+});