refactor: remove empty audio_update() function

Function had no implementation and served no purpose. Removed declaration, definition, and all call sites.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

4 files changed, 0 insertions, 12 deletions

diff --git a/src/app/main.cc b/src/app/main.cc
index 7496e8c..eefec03 100644
--- a/src/app/main.cc
+++ b/src/app/main.cc
@@ -417,10 +417,6 @@ int main(int argc, char** argv) {
     RenderTimeline(gpu_get_surface(), (float)current_physical_time, width, height,
                      absolute_beat_time, visual_peak);
     last_frame_time = current_physical_time;
-
-    // Update audio systems (tracker, synth, etc.) based on audio time
-    // progression
-    audio_update();
   }
 
 #if !defined(STRIP_ALL) && defined(DEMO_HEADLESS)
diff --git a/src/app/test_demo.cc b/src/app/test_demo.cc
index 993ceba..cf1a577 100644
--- a/src/app/test_demo.cc
+++ b/src/app/test_demo.cc
@@ -399,10 +399,6 @@ int main(int argc, char** argv) {
     const float graphics_frame_time = (float)current_physical_time;
     RenderTimeline(gpu_get_surface(), graphics_frame_time, width, height,
                        absolute_beat_time, visual_peak);
-
-    // Update audio systems (tracker, synth, etc.) based on audio time
-    // progression
-    audio_update();
   }
 
   // Shutdown
diff --git a/src/audio/audio.cc b/src/audio/audio.cc
index b60dad0..9a6d689 100644
--- a/src/audio/audio.cc
+++ b/src/audio/audio.cc
@@ -297,9 +297,6 @@ void audio_render_silent(float duration_sec) {
 }
 #endif /* !defined(STRIP_ALL) */
 
-void audio_update() {
-}
-
 void audio_shutdown() {
   if (g_audio_backend != nullptr) {
     g_audio_backend->shutdown();
diff --git a/src/audio/audio.h b/src/audio/audio.h
index 97a8c99..6abdfb2 100644
--- a/src/audio/audio.h
+++ b/src/audio/audio.h
@@ -56,5 +56,4 @@ void audio_render_silent(float duration_sec); // Fast-forwards audio state
 void audio_set_backend(AudioBackend* backend);
 AudioBackend* audio_get_backend();
 #endif /* !defined(STRIP_ALL) */
-void audio_update();
 void audio_shutdown();