modules/bitrate_controller/include is no longer a legacy api directory

It was deleted in https://webrtc-review.googlesource.com/c/src/+/154346

Bug: None
Change-Id: I737bb5777fa4ef7aad70989a53405666dd9f0f64
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/194329
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32666}
diff --git a/native-api.md b/native-api.md
index 2c19327..2ce74c35 100644
--- a/native-api.md
+++ b/native-api.md
@@ -19,7 +19,6 @@
 `modules/audio_coding/include`             | No
 `modules/audio_device/include`             | No
 `modules/audio_processing/include`         | No
-`modules/bitrate_controller/include`       | No
 `modules/congestion_controller/include`    | No
 `modules/include`                          | No
 `modules/remote_bitrate_estimator/include` | No