Revert D52877026: Multisect successfully blamed "D52877026: delay sit…

…e import" for otest failure

Summary:
This diff is reverting D52877026
D52877026: delay site import by zsol has been identified to be causing the following test failure:

Tests affected:
- [tools/make_par:environment_tests - test_ld_preload_xar_forkserver (tools.make_par.environment_tests.EnvironmentTests)](https://www.internalfb.com/intern/test/281475066289502/)

Here's the Multisect link:
https://www.internalfb.com/multisect/4026549
Here are the tasks that are relevant to this breakage:

We're generating a revert to back out the changes in this diff, please note the backout may land if someone accepts it.

If you believe this diff has been generated in error you may Commandeer and Abandon it.

Reviewed By: zsol

Differential Revision: D52906644

fbshipit-source-id: d26c06e22921a4337f35572a73fcabf7dfad84bb

prelude/python/tools/embedded_main.cpp

@@ -51,32 +51,6 @@ std::optional<int> MaybeGetExitCode(PyStatus* status, PyConfig* config) {
 extern struct _inittab _static_extension_info[];
 PyMODINIT_FUNC PyInit__static_extension_utils();
 
-void call_site_main() {
-  PyObject* siteModule = PyImport_ImportModule("site");
-  if (siteModule == nullptr) {
-    PyErr_Print();
-    fprintf(stderr, "Error: could not import module 'site'\n");
-  } else {
-    PyObject* siteMain = PyObject_GetAttrString(siteModule, "main");
-    Py_DECREF(siteModule);
-    if (siteMain == nullptr || !PyCallable_Check(siteMain)) {
-      PyErr_Print();
-      fprintf(
-          stderr, "Error: could not find function 'main' in module 'site'\n");
-      Py_DECREF(siteMain);
-    } else {
-      PyObject* siteMainResult = PyObject_CallObject(siteMain, nullptr);
-      Py_DECREF(siteMain);
-      if (siteMainResult == nullptr) {
-        PyErr_Print();
-        fprintf(
-            stderr, "Error: could not call function 'main' in module 'site'\n");
-      }
-      Py_DECREF(siteMainResult);
-    }
-  }
-}
-
 int main(int argc, char* argv[]) {
   PyStatus status;
   PyConfig config;
@@ -114,10 +88,6 @@ int main(int argc, char* argv[]) {
     }
   }
 
-  // Defer importing `site` until after static extension finder is initialized.
-  auto siteImport = config.site_import;
-  config.site_import = 0;
-
   // Check if we're using par_style="native", if so, modify sys.path to include
   // the executable-zipfile to it, and set a main module to run when invoked.
 #ifdef NATIVE_PAR_STYLE
@@ -218,8 +188,5 @@ int main(int argc, char* argv[]) {
   }
 
   PyConfig_Clear(&config);
-  if (siteImport) {
-    call_site_main();
-  }
   return Py_RunMain();
 }