Remove component state initialization

The state initialization is performed when the component goes into
submittin mode. However, after the form is submitted, the component
unmounts and the state is destroyed.

src/forms/StripePaymentForm/StripePaymentForm.js

@@ -113,9 +113,6 @@ class StripePaymentForm extends Component {
       }
     });
   }
-  componentWillReceiveProps() {
-    this.setState(initialState);
-  }
   componentWillUnmount() {
     if (this.card) {
       this.card.removeEventListener('change', this.handleCardValueChange);