WP Smush: Allows you to skip WP Smush Meta while exporting WordPress content

skip_smush_meta.php

add_filter( 'wxr_export_skip_postmeta', 'skip_smush_meta', '', 2 );
 /**
  * Skip WP Smush meta while exporting
  *
  * @param $skip, Whether to skip meta key or not
  * @param $meta_key, Current meta_key
  *
  * @return bool
  */
 function skip_smush_meta( $skip, $meta_key ) {
 	if( 'wp-smpro-smush-data' == $meta_key ) {
 		return true;
	}
	return $skip;
 }