restore grpc_generate_one_off_targets()
diff --git a/bazel/grpc_build_system.bzl b/bazel/grpc_build_system.bzl
index 63ed77e..a682d89 100644
--- a/bazel/grpc_build_system.bzl
+++ b/bazel/grpc_build_system.bzl
@@ -158,6 +158,8 @@
     linkopts = if_not_windows(["-pthread"]) + linkopts,
   )
 
+def grpc_generate_one_off_targets(): pass
+
 def grpc_sh_test(name, srcs, args = [], data = []):
   native.sh_test(
     name = name,