Remove unsupported visibility from gerrit_api_version repo rule

The gerrit_api_version repository rule does not define a visibility
attribute. Newer Bazel versions in the 10.x series reject unknown
attributes on repository rules, so this now fails during module
evaluation.

Remove the unused visibility attribute from the MODULE.bazel call.

Change-Id: Ibb15bfac075f1391be30e660dfcdc3cc7b619b34

MODULE.bazel

diff --git a/MODULE.bazel b/MODULE.bazel
index 7875159..8d86754 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -20,5 +20,4 @@
 gerrit_api_version(
     name = "gerrit_api_version",
     version = GERRIT_API_VERSION,
-    visibility = ["//visibility:public"],
 )