Blockbase: Remove wpcom hook (#4563)

* Blockbase: Remove wpcom hook

* Removed the two unused wpcom files

Co-authored-by: Jason Crist <jcrist@pbking.com>

blockbase/inc/wpcom.php

@@ -1,14 +0,0 @@
-<?php
-/**
- * WordPress.com-specific functions and definitions.
- *
- * This file is centrally included from `wp-content/mu-plugins/wpcom-theme-compat.php`.
- *
- * @package Blockbase
- */
-
-/**
- * Restores the Customizer since we still rely on it.
- * (For WPcom REST API requests to work properly.)
- */
-add_action( 'restapi_theme_init', 'blockbase_restore_customizer', 11 );