Remove sys.modules hack

Fix #1888 (metadata accidentally not picklable), and removes a case where reimporting a vendored module results in a second copy of the same module.

1 files changed, 0 insertions, 7 deletions

diff --git a/setuptools/extern/__init__.py b/setuptools/extern/__init__.py
index e8c616f9..4e79aa17 100644
--- a/setuptools/extern/__init__.py
+++ b/setuptools/extern/__init__.py
@@ -43,13 +43,6 @@ class VendorImporter:
                 __import__(extant)
                 mod = sys.modules[extant]
                 sys.modules[fullname] = mod
-                # mysterious hack:
-                # Remove the reference to the extant package/module
-                # on later Python versions to cause relative imports
-                # in the vendor package to resolve the same modules
-                # as those going through this importer.
-                if sys.version_info >= (3, ):
-                    del sys.modules[extant]
                 return mod
             except ImportError:
                 pass