Docs: Remove @access notations from method DocBlocks in wp-admin/* classes.

Prior to about 2013, many class methods lacked even access modifiers which made the `@access` notations that much more useful. Now that we've gotten to a point where the codebase is more mature from a maintenance perspective and we can finally remove these notations. Notable exceptions to this change include standalone functions notated as private as well as some classes still considered to represent "private" APIs.

See #41452.

Built from https://develop.svn.wordpress.org/trunk@41161


git-svn-id: http://core.svn.wordpress.org/trunk@41001 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/custom-background.php

@@ -18,7 +18,6 @@ class Custom_Background {
 	 *
 	 * @var callable
 	 * @since 3.0.0
-	 * @access public
 	 */
 	public $admin_header_callback;
 
@@ -27,7 +26,6 @@ class Custom_Background {
 	 *
 	 * @var callable
 	 * @since 3.0.0
-	 * @access public
 	 */
 	public $admin_image_div_callback;
 
@@ -35,7 +33,6 @@ class Custom_Background {
 	 * Used to trigger a success message when settings updated and set to true.
 	 *
 	 * @since 3.0.0
-	 * @access private
 	 * @var bool
 	 */
 	private $updated;