Remove unused yapf prebuilt

Change-Id: I93ecb844ba4abdba5af32c775773da23b580655a
Reviewed-on: https://fuchsia-review.googlesource.com/c/infra/prebuilt/+/427654
Reviewed-by: Marc-Antoine Ruel <maruel@google.com>
Commit-Queue: Marc-Antoine Ruel <maruel@google.com>
diff --git a/cipd.ensure b/cipd.ensure
index c4cac34..bd09f98 100644
--- a/cipd.ensure
+++ b/cipd.ensure
@@ -50,8 +50,3 @@
 
 # preview_email
 infra/tools/preview_email/${platform} git_revision:3faa8f7f5fccac626b79ce2fe5a43993f80d8af2
-
-
-# YAPF
-# Keep in sync with fuchsia/prebuilts.
-infra/tools/yapf git_revision:c3517c148417dc7c53141c4edda4a85765b04c62