Disable the lesson archive

[m1r0]

Fixes #4241

Changes proposed in this Pull Request

This PR disables the lesson archive by default. The GH issue explains why this is needed.

Testing instructions

• Refresh your permalinks.
• Check if the archive is disabled by visiting yoursite.com/lesson.

Notes

If someone needs this feature, it could be enabled again with the following snippet:

add_filter( 'sensei_register_post_type_lesson', function( $args ) {
	$args['has_archive'] = true;
	return $args;
} );

[Imran92]

Nice 👍