KSES: Remove duplicate `object-position` property.

As part of some recent changes, the property was added to the list of safe CSS properties twice.

Follow-up to [50634], [50761].

See #52991.
Built from https://develop.svn.wordpress.org/trunk@50922


git-svn-id: http://core.svn.wordpress.org/trunk@50531 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/kses.php

@@ -2248,8 +2248,6 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
 			'margin-left',
 			'margin-top',
 
-			'object-position',
-
 			'padding',
 			'padding-right',
 			'padding-bottom',

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.8-alpha-50921';
+$wp_version = '5.8-alpha-50922';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.