DEPS: don't recurse in buildtools.

buildtools' DEPS file will soon be removed and we should roll each of
its dependencies directly in Dawn's DEPS file instead.

It also avoids Chromium recursedeps'ing into Dawn's buildtools when it
will start recursedeps'ing into Dawn.

Bug: chromium:1177288
Change-Id: I02503e044a2c6013217129e3f07378b1dbdfef9b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/46623
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
diff --git a/DEPS b/DEPS
index 4bee0f1..5d46831 100644
--- a/DEPS
+++ b/DEPS
@@ -231,7 +231,5 @@
 ]
 
 recursedeps = [
-  # buildtools provides clang_format, libc++, and libc++abi
-  'buildtools',
   'third_party/vulkan-deps',
 ]