Remove 3rd party plugin from WordPress.org updates checks

remove_plugin_from_wporg_updates.php

<?php
/**
 * Remove this plugin from the wp.org update requests by shortcircuiting the HTTP request
 * This function should be placed on the plugin main file and namespaced accordingly
 * Unfortunately, this will only work if the plugin is active
 * 
 * @param array  $parsed_args An array of HTTP request arguments.
 * @param string $url         The request URL.
 */
function namespace_this_remove_plugin_from_wporg_updates( $parsed_args, $url ) {
	$plugin_basename = plugin_basename( __FILE__ );
	if ( strpos( $url, 'api.wordpress.org/plugins/update-check' ) === false ) {
		// Not a plugin update request. Bail immediately.
		return $parsed_args;
	} elseif ( isset( $parsed_args['body']['plugins'] ) ) {
		$plugins = json_decode( $parsed_args['body']['plugins'] );
		if ( isset( $plugins->plugins->$plugin_basename ) ) {
			// Remove our plugin
			unset( $plugins->plugins->$plugin_basename );
			// No need to check if isset because this code would not run if the plugin isn't active
			unset( $plugins->active[ array_search( $plugin_basename, $plugins->active ) ] );
			// Rebuild arguments
			$parsed_args['body']['plugins'] = wp_json_encode( $plugins );
		}
	}
	return $parsed_args;
}

add_filter( 'http_request_args', array( $this, 'namespace_this_remove_plugin_from_wporg_updates' ), 5, 2 );