Remove deprecated isLarge prop from Button

The isLarge prop has been removed from Gutenberg Button component. Leaving the prop in place results in console error so should be removed.

WordPress/gutenberg#23239

extensions/blocks/opentable/restaurant-picker.js

@@ -62,7 +62,7 @@ export default function RestaurantPicker( props ) {
 			{ props.onSubmit ? (
 				<form onSubmit={ onSubmit }>
 					{ formInput }
-					<Button isSecondary isLarge type="submit">
+					<Button isSecondary type="submit">
 						{ __( 'Embed', 'jetpack' ) }
 					</Button>
 				</form>