Enable rustfmt CI for Windows. (#1403)

diff --git a/.bazelci/presubmit.yml b/.bazelci/presubmit.yml
index 5a10d60..32e2ecd 100644
--- a/.bazelci/presubmit.yml
+++ b/.bazelci/presubmit.yml
@@ -15,7 +15,6 @@
   - "-//bindgen/..."
   - "-//test/proto/..."
   - "-//tools/rust_analyzer/..."
-  - "-//test/rustfmt/..."
 crate_universe_vendor_example_targets: &crate_universe_vendor_example_targets
   - "//vendor_external:crates_vendor"
   - "//vendor_local_manifests:crates_vendor"