Media: Remove media player support for `.aac` files due to only partial support in Firefox.

This still allows `.aac` files to be uploaded, but does not explicitly declare support for use in the editor and within embeds to prevent bad UX.

Props desrosj.
See #42919.
Built from https://develop.svn.wordpress.org/trunk@43135


git-svn-id: http://core.svn.wordpress.org/trunk@42964 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/media.php

@@ -2248,9 +2248,9 @@ function wp_get_audio_extensions() {
 	 * @since 3.6.0
 	 *
 	 * @param array $extensions An array of supported audio formats. Defaults are
-	 *                          'mp3', 'aac', 'ogg', 'flac', 'm4a', 'wav'.
+	 *                          'mp3', 'ogg', 'flac', 'm4a', 'wav'.
 	 */
-	return apply_filters( 'wp_audio_extensions', array( 'mp3', 'aac', 'ogg', 'flac', 'm4a', 'wav' ) );
+	return apply_filters( 'wp_audio_extensions', array( 'mp3', 'ogg', 'flac', 'm4a', 'wav' ) );
 }
 
 /**

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-alpha-43132';
+$wp_version = '5.0-alpha-43135';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.