[python] Remove explicit visibility("default") on PyInit__message (#16125)
This is unnecessary as PyMODINIT_FUNC already implies Py_EXPORTED_SYMBOL.
Closes #16125
COPYBARA_INTEGRATE_REVIEW=https://github.com/protocolbuffers/protobuf/pull/16125 from goffrie:upb_export 5e7fa705448865b7e64357b7ceb8c2810daf133f
PiperOrigin-RevId: 700793109
diff --git a/python/protobuf.c b/python/protobuf.c
index 61a3a43..12b5f44 100644
--- a/python/protobuf.c
+++ b/python/protobuf.c
@@ -401,7 +401,7 @@
// Module Entry Point
// -----------------------------------------------------------------------------
-__attribute__((visibility("default"))) PyMODINIT_FUNC PyInit__message(void) {
+PyMODINIT_FUNC PyInit__message(void) {
PyObject* m = PyModule_Create(&module_def);
if (!m) return NULL;