Merge pull request #20286 from gnossen/remove_unused_load

Remove unused load from python_rules.bzl

bazel/python_rules.bzl

@@ -5,7 +5,6 @@ load(
     "get_include_protoc_args",
     "get_plugin_args",
     "get_proto_root",
-    "proto_path_to_generated_filename",
     "protos_from_context",
     "includes_from_deps",
     "get_proto_arguments",