audiohal: Remove stale TODOs

Bug: 34109709
Change-Id: I9b30ffa2ed06be8cf31cdbfbcc0f4cb0dac7be54
Test: make
diff --git a/audio/effect/2.0/default/Effect.cpp b/audio/effect/2.0/default/Effect.cpp
index 6704239..2d36604 100644
--- a/audio/effect/2.0/default/Effect.cpp
+++ b/audio/effect/2.0/default/Effect.cpp
@@ -205,7 +205,7 @@
     halConfig->buffer.raw = NULL;
     halConfig->samplingRate = config.samplingRateHz;
     halConfig->channels = static_cast<uint32_t>(config.channels);
-    // TODO(mnaganov): The framework code currently does not use BP, implement later.
+    // Note: The framework code does not use BP.
     halConfig->bufferProvider.cookie = NULL;
     halConfig->bufferProvider.getBuffer = NULL;
     halConfig->bufferProvider.releaseBuffer = NULL;