treewide: format repo with buildifier

Change-Id: Ia7aebeb7bba5b119c9157d1ad805cc477bcbb68a
Reviewed-on: https://review.monogon.dev/c/monogon/+/3774
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>
diff --git a/metropolis/proto/BUILD.bazel b/metropolis/proto/BUILD.bazel
index 42aecdc..d3a0f89 100644
--- a/metropolis/proto/BUILD.bazel
+++ b/metropolis/proto/BUILD.bazel
@@ -1,4 +1,4 @@
-load("@rules_proto_grpc_buf//:defs.bzl", "buf_proto_breaking_test", "buf_proto_lint_test")
+load("@rules_proto_grpc_buf//:defs.bzl", "buf_proto_lint_test")
 load("@rules_proto_grpc_doc//:defs.bzl", "doc_html_compile")
 
 doc_html_compile(