Adding product data to `removed_from_cart` event

Adding `$thisbutton.data()` to the arguments sent by the `removed_from_cart` event.
This would help developers easily detect which product has just been removed and alter their theme/plugin accordingly.

assets/js/frontend/add-to-cart.js

@@ -86,7 +86,7 @@ jQuery( function( $ ) {
 				window.location = $thisbutton.attr( 'href' );
 				return;
 			}
-			$( document.body ).trigger( 'removed_from_cart', [ response.fragments, response.cart_hash ] );
+			$( document.body ).trigger( 'removed_from_cart', [ response.fragments, response.cart_hash, $thisbutton.data() ] );
 		}).fail( function() {
 			window.location = $thisbutton.attr( 'href' );
 			return;