Fix audio api for v2

Change-Id: Iea24515888fd3d5f4cc3a1abed302784ce40f8b0
diff --git a/mbtk/libmbtk_lib_v2/audio/mbtk_pcm_stream.c b/mbtk/libmbtk_lib_v2/audio/mbtk_pcm_stream.c
index cb855c2..c6a68c4 100755
--- a/mbtk/libmbtk_lib_v2/audio/mbtk_pcm_stream.c
+++ b/mbtk/libmbtk_lib_v2/audio/mbtk_pcm_stream.c
@@ -700,7 +700,6 @@
 
 mbtk_audio_handle mbtk_audio_open_new(mbtk_audio_dev_enum dev, int flag, int rate, void *usrData)
 {
-
     struct mopen_audio_t *aud_hdl = NULL;
     int ret;
 
@@ -756,23 +755,6 @@
     return NULL;
 }
 
-int mbtk_audio_playback_set_block_flag(mbtk_audio_handle handle, int flags)
-{
-    if (handle == NULL) {
-        LOGE("Invalid handle: NULL");
-        return -1;
-    }
-
-    if (flags < 0) {
-        LOGE("Invalid flags: %d", flags);
-        return -1;
-    }
-
-    LOGD("Setting block flag: %d", flags);
-
-    return 0;
-}
-
 int mbtk_audio_play_file_new(void *dev_hdl, int file_fd, int offset)
 {
     unsigned bufsize = 0;
diff --git a/mbtk/libmbtk_lib_v2/audio/mbtk_wav.c b/mbtk/libmbtk_lib_v2/audio/mbtk_wav.c
index 403db74..b5b4c33 100755
--- a/mbtk/libmbtk_lib_v2/audio/mbtk_wav.c
+++ b/mbtk/libmbtk_lib_v2/audio/mbtk_wav.c
@@ -29,7 +29,6 @@
 
 static int current_loopback_state = 0;
 static int current_loopback_device = -1;
-static mbtk_audio_service_error_cb_f service_error_cb = NULL;
 
 static void audio_play_thread(void *arg)
 {
@@ -133,17 +132,6 @@
     }
 }
 
-int mbtk_register_error_callback(mbtk_audio_service_error_cb_f cb)
-{
-    if (cb == NULL) {
-        LOGE("Error: Callback function is NULL.");
-        return -1;
-    }
-    service_error_cb = cb;
-    LOGD("Callback function registered successfully.");
-    return 0;
-}
-
 int mbtk_audio_wav_init()
 {
     //mbtk_log_init("radio", "MBTK_AUDIO");