aout: remove ->device_enum (fixes #8248)

include/vlc_aout.h

@@ -158,15 +158,6 @@ struct audio_output
       * \param mute true to mute, false to unmute
       * \warning A stream may or may not have been started when called.
       */
-    int (*device_enum)(audio_output_t *, char ***ids, char ***names);
-    /**< Enumerates available audio output devices (optional, may be NULL).
-      * \param ids pointer to a heap-allocated table of heap-allocated
-      *            nul-terminated device unique identifiers [OUT]
-      * \param names pointer to a heap-allocated table of heap-allocated
-      *              nul-terminated device human-readable names [OUT]
-      * \return The number of entries, or -1 on error.
-      * \warning A stream may or may not have been started when called.
-      */
     int (*device_select)(audio_output_t *, const char *id);
     /**< Selects an audio output device (optional, may be NULL).
       * \param id nul-terminated device unique identifier.