[T108][AUDIO] Remove underlying callback and ql_audio_playback_set_block_flag interface

Change-Id: If12a60d2c8f3c0d067af95719c5e5ee6bdea42fe
diff --git a/mbtk/include/mbtk/mbtk_audio2.h b/mbtk/include/mbtk/mbtk_audio2.h
index d84d1ea..ca38a76 100755
--- a/mbtk/include/mbtk/mbtk_audio2.h
+++ b/mbtk/include/mbtk/mbtk_audio2.h
@@ -19,7 +19,6 @@
 
 typedef void (*mbtk_audio_volume_set_func)();
 
-typedef void (*mbtk_audio_service_error_cb_f)(int error);
 
 typedef enum {
     MBTK_AUDIO_DIRECTION_OUTPUT = 0,    // Play
@@ -113,8 +112,6 @@
 
 int mbtk_audio_close_new(void *dev_hdl);
 
-int mbtk_register_error_callback(mbtk_audio_service_error_cb_f cb);
-int mbtk_audio_playback_set_block_flag(mbtk_audio_handle handle, int flags);
 
 /**
  *    device: UINT32
diff --git a/mbtk/libmbtk_lib/audio/mbtk_pcm_stream.c b/mbtk/libmbtk_lib/audio/mbtk_pcm_stream.c
index 82d28ce..c6a68c4 100755
--- a/mbtk/libmbtk_lib/audio/mbtk_pcm_stream.c
+++ b/mbtk/libmbtk_lib/audio/mbtk_pcm_stream.c
@@ -755,23 +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/audio/mbtk_wav.c b/mbtk/libmbtk_lib/audio/mbtk_wav.c
index 403db74..b5b4c33 100755
--- a/mbtk/libmbtk_lib/audio/mbtk_wav.c
+++ b/mbtk/libmbtk_lib/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");