Removed the calcWidth in willMount for TextField

There is no point in doing the willMount checl for resizing width and
should wait until fully mounted to have access to the DOM nodes anyways.

src/js/TextFields/TextField.js

@@ -403,16 +403,6 @@ export default class TextField extends PureComponent {
     };
   }
 
-  componentWillMount() {
-    const { value, defaultValue, resize } = this.props;
-    const v = typeof value !== 'undefined' ? value : defaultValue;
-    if (!resize || typeof document === 'undefined' || !v) {
-      return;
-    }
-
-    this.setState({ width: this._calcWidth(v) });
-  }
-
   componentDidMount() {
     const { value, defaultValue, resize } = this.props;
     const v = typeof value !== 'undefined' ? value : defaultValue;