treewide: Unmark ENUM_ZERO_VALUE_SUFFIX rule exception as todo

We don't really have a policy for these, they are chosen arbitrarily.

Change-Id: I705ad309c2a36d794665de2482441858850a1893
Reviewed-on: https://review.monogon.dev/c/monogon/+/3805
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
Tested-by: Jenkins CI
diff --git a/cloud/agent/api/BUILD.bazel b/cloud/agent/api/BUILD.bazel
index e07df2d..48139f2 100644
--- a/cloud/agent/api/BUILD.bazel
+++ b/cloud/agent/api/BUILD.bazel
@@ -8,7 +8,7 @@
     except_rules = [
         "PACKAGE_VERSION_SUFFIX",
         "MESSAGE_PASCAL_CASE",
-        "ENUM_ZERO_VALUE_SUFFIX",  # TODO: evaluate correctness
+        "ENUM_ZERO_VALUE_SUFFIX",
     ],
     protos = [":api_proto"],
     use_rules = [