Docs: Remove @staticvar tags from core.

The tag was supported in phpDocumentor 1.x, but is no longer supported in 2.x and 3.x.

Usage of static variables is considered an internal implementation detail and has no information value for someone reading the docs.

Props alishanvr, jrf.
Fixes #50426.

git-svn-id: https://develop.svn.wordpress.org/trunk@48109 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/media.php

@@ -1982,8 +1982,6 @@ add_shortcode( 'gallery', 'gallery_shortcode' );
  *
  * @since 2.5.0
  *
- * @staticvar int $instance
- *
  * @param array $attr {
  *     Attributes of the gallery shortcode.
  *
@@ -2312,7 +2310,6 @@ function wp_playlist_scripts( $type ) {
  * @since 3.9.0
  *
  * @global int $content_width
- * @staticvar int $instance
  *
  * @param array $attr {
  *     Array of default playlist attributes.
@@ -2646,8 +2643,6 @@ function wp_get_attachment_id3_keys( $attachment, $context = 'display' ) {
  *
  * @since 3.6.0
  *
- * @staticvar int $instance
- *
  * @param array  $attr {
  *     Attributes of the audio shortcode.
  *
@@ -2860,7 +2855,6 @@ function wp_get_video_extensions() {
  * @since 3.6.0
  *
  * @global int $content_width
- * @staticvar int $instance
  *
  * @param array  $attr {
  *     Attributes of the shortcode.