Media: Remove global import for `$content_width` in `_wp_post_thumbnail_html()`.

`$content_width` is unused since [35023].

See #28512.
Built from https://develop.svn.wordpress.org/trunk@38136


git-svn-id: http://core.svn.wordpress.org/trunk@38077 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/post.php

@@ -1375,7 +1375,6 @@ function get_sample_permalink_html( $id, $new_title = null, $new_slug = null ) {
  *
  * @since 2.9.0
  *
- * @global int   $content_width
  * @global array $_wp_additional_image_sizes
  *
  * @param int $thumbnail_id ID of the attachment used for thumbnail
@@ -1383,7 +1382,7 @@ function get_sample_permalink_html( $id, $new_title = null, $new_slug = null ) {
  * @return string html
  */
 function _wp_post_thumbnail_html( $thumbnail_id = null, $post = null ) {
-	global $content_width, $_wp_additional_image_sizes;
+	global $_wp_additional_image_sizes;
 
 	$post               = get_post( $post );
 	$post_type_object   = get_post_type_object( $post->post_type );

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.6-beta4-38135';
+$wp_version = '4.6-beta4-38136';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.