Remove the custom mobile code, and use the default web implementation

packages/editor/src/components/post-title/index.native.js

@@ -12,19 +12,13 @@ import { withDispatch } from '@wordpress/data';
 import { withFocusOutside } from '@wordpress/components';
 import { withInstanceId, compose } from '@wordpress/compose';
 
-import {
-	getDefaultBlockName,
-	createBlock,
-} from '@wordpress/blocks';
-
 class PostTitle extends Component {
 	constructor() {
 		super( ...arguments );
 
 		this.onChange = this.onChange.bind( this );
 		this.onSelect = this.onSelect.bind( this );
 		this.onUnselect = this.onUnselect.bind( this );
-		this.onEnter = this.onEnter.bind( this );
 
 		this.state = {
 			isSelected: false,
@@ -48,14 +42,6 @@ class PostTitle extends Component {
 		this.props.onUpdate( title );
 	}
 
-	onEnter( ) {
-		const { insertBlocksAfter } = this.props;
-		if ( ! insertBlocksAfter ) {
-			return;
-		}
-		insertBlocksAfter( [ createBlock( getDefaultBlockName() ) ] );
-	}
-
 	render() {
 		const {
 			placeholder,
@@ -70,7 +56,7 @@ class PostTitle extends Component {
 				blurOnSubmit={ true }
 				textAlignVertical="top"
 				multiline={ false }
-				onSubmitEditing={ this.onEnter }
+				onSubmitEditing={ this.props.onEnterPress }
 				returnKeyType={ 'next' }
 				onChangeText={ this.onChange }
 				onFocus={ this.onSelect }
@@ -84,10 +70,14 @@ class PostTitle extends Component {
 
 const applyWithDispatch = withDispatch( ( dispatch ) => {
 	const {
+		insertDefaultBlock,
 		clearSelectedBlock,
 	} = dispatch( 'core/editor' );
 
 	return {
+		onEnterPress() {
+			insertDefaultBlock( undefined, undefined, 0 );
+		},
 		clearSelectedBlock,
 	};
 } );