Revert D35124731: Automatically extern C extension modules in torch.package

Test Plan: revert-hammer

Differential Revision:
D35124731 (0f27b4b7fc)

Original commit changeset: a4b7fdf3210e

Original Phabricator Diff: D35124731 (0f27b4b7fc)

fbshipit-source-id: ee598f18d43ea1becb6f2673c7ae309e4b4dda35
(cherry picked from commit 6248897d18f4f02f0ad7353c4b78f1cbb12250ae)

torch/package/package_exporter.py

@@ -187,7 +187,6 @@ class PackageExporter:
         self,
         f: Union[str, Path, BinaryIO],
         importer: Union[Importer, Sequence[Importer]] = sys_importer,
-        auto_extern_c_extension_modules: bool = False,
     ):
         """
         Create an exporter.
@@ -197,8 +196,6 @@ class PackageExporter:
                 or a binary I/O object.
             importer: If a single Importer is passed, use that to search for modules.
                 If a sequence of importers are passsed, an ``OrderedImporter`` will be constructed out of them.
-            auto_extern_c_extension_modules: Flag whether to enable autoly extern c extension modules (``True``),
-                or disable (``False``).
         """
         if isinstance(f, (Path, str)):
             f = str(f)
@@ -212,8 +209,6 @@ class PackageExporter:
 
         self.serialized_reduces: Dict[int, Any] = {}
 
-        self.auto_extern_c_extension_modules = auto_extern_c_extension_modules
-
         # A graph tracking all the modules and pickle objects added to this
         # package and the dependencies between them.
         # - Each node is a module name (or a pickle name that looks like '<foo.obj.pkl>')
@@ -533,17 +528,7 @@ class PackageExporter:
             if filename is None:
                 packaging_error = PackagingErrorReason.NO_DUNDER_FILE
             elif filename.endswith(tuple(importlib.machinery.EXTENSION_SUFFIXES)):
-                if self.auto_extern_c_extension_modules:
-                    self.extern([module_name])
-                    self.dependency_graph.add_node(
-                        module_name,
-                        action=_ModuleProviderAction.EXTERN,
-                        is_package=is_package,
-                        provided=True,
-                    )
-                    return
-                else:
-                    packaging_error = PackagingErrorReason.IS_EXTENSION_MODULE
+                packaging_error = PackagingErrorReason.IS_EXTENSION_MODULE
             else:
                 packaging_error = PackagingErrorReason.SOURCE_FILE_NOT_FOUND
                 error_context = f"filename: {filename}"