Customize: Prevent customize_autosaved=on from getting added to frontend preview URLs.

Amends [41969].
See #39896, #42450.
Fixes #42433.

Built from https://develop.svn.wordpress.org/trunk@42118


git-svn-id: http://core.svn.wordpress.org/trunk@41947 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/customize-controls.js

@@ -7775,9 +7775,6 @@
 				if ( ! api.state( 'activated' ).get() ) {
 					params.customize_theme = api.settings.theme.stylesheet;
 				}
-				if ( api.settings.changeset.autosaved || ! api.state( 'saved' ).get() ) {
-					params.customize_autosaved = 'on';
-				}
 
 				urlParser.search = $.param( params );
 				return urlParser.href;