Responding to code review #9221 (review) . Thanks @spicyj!

scripts/fiber/tests-failing.txt

@@ -48,7 +48,6 @@ src/renderers/dom/shared/__tests__/ReactDOMServerIntegration-test.js
 * renders no HTML events with client render on top of good server markup
 * renders a div with text with client render on top of good server markup
 * renders a div with text with flanking whitespace with client render on top of good server markup
-* renders a div with text child in brackets with client render on top of good server markup
 * renders a div with an empty text child with client render on top of good server markup
 * renders a div with multiple empty text children with server string render
 * renders a div with multiple empty text children with client render on top of good server markup
@@ -90,7 +89,6 @@ src/renderers/dom/shared/__tests__/ReactDOMServerIntegration-test.js
 * renders a newline-eating tag with content starting with \n with client render on top of good server markup
 * renders a normal tag with content starting with \n with client render on top of good server markup
 * renders stateless components with client render on top of good server markup
-* renders React.createClass components with client render on top of good server markup
 * renders ES6 class components with client render on top of good server markup
 * renders factory components with client render on top of good server markup
 * renders single child hierarchies of components with client render on top of good server markup

scripts/fiber/tests-passing-except-dev.txt

@@ -49,7 +49,6 @@ src/renderers/dom/shared/__tests__/ReactDOMServerIntegration-test.js
 * renders no HTML events with client render on top of bad server markup
 * renders a div with text with client render on top of bad server markup
 * renders a div with text with flanking whitespace with client render on top of bad server markup
-* renders a div with text child in brackets with client render on top of bad server markup
 * renders a div with an empty text child with client render on top of bad server markup
 * renders a div with multiple empty text children with client render on top of bad server markup
 * renders a div with multiple whitespace children with client render on top of bad server markup
@@ -80,7 +79,6 @@ src/renderers/dom/shared/__tests__/ReactDOMServerIntegration-test.js
 * renders a newline-eating tag with content starting with \n with client render on top of bad server markup
 * renders a normal tag with content starting with \n with client render on top of bad server markup
 * renders stateless components with client render on top of bad server markup
-* renders React.createClass components with client render on top of bad server markup
 * renders ES6 class components with client render on top of bad server markup
 * renders factory components with client render on top of bad server markup
 * renders single child hierarchies of components with client render on top of bad server markup

scripts/fiber/tests-passing.txt

@@ -1142,8 +1142,6 @@ src/renderers/dom/shared/__tests__/ReactDOMServerIntegration-test.js
 * renders a div with text with clean client render
 * renders a div with text with flanking whitespace with server string render
 * renders a div with text with flanking whitespace with clean client render
-* renders a div with text child in brackets with server string render
-* renders a div with text child in brackets with clean client render
 * renders a div with an empty text child with server string render
 * renders a div with an empty text child with clean client render
 * renders a div with multiple empty text children with clean client render
@@ -1193,8 +1191,6 @@ src/renderers/dom/shared/__tests__/ReactDOMServerIntegration-test.js
 * renders a normal tag with content starting with \n with clean client render
 * renders stateless components with server string render
 * renders stateless components with clean client render
-* renders React.createClass components with server string render
-* renders React.createClass components with clean client render
 * renders ES6 class components with server string render
 * renders ES6 class components with clean client render
 * renders factory components with server string render

src/renderers/dom/shared/__tests__/ReactDOMServerIntegration-test.js

@@ -484,12 +484,6 @@ describe('ReactDOMServerIntegration', () => {
         expectNode(e.childNodes[0], TEXT_NODE_TYPE, '  Text ');
       });
 
-      itRenders('a div with text child in brackets', async render => {
-        const e = await render(<div>{'Text'}</div>);
-        expect(e.childNodes.length).toBe(1);
-        expectNode(e.firstChild, TEXT_NODE_TYPE, 'Text');
-      });
-
       itRenders('a div with an empty text child', async render => {
         const e = await render(<div>{''}</div>);
         expect(e.childNodes.length).toBe(0);
@@ -803,15 +797,6 @@ describe('ReactDOMServerIntegration', () => {
         checkFooDiv(await render(<StatelessComponent />));
       });
 
-      itRenders('React.createClass components', async render => {
-        const RccComponent = React.createClass({
-          render: function() {
-            return <div>foo</div>;
-          },
-        });
-        checkFooDiv(await render(<RccComponent />));
-      });
-
       itRenders('ES6 class components', async render => {
         class ClassComponent extends React.Component {
           render() {