Revert "Fix relative-beyond-top-level false positive (pylint-dev#…

…1186)"

This reverts commit 1437e73.

ChangeLog

@@ -36,10 +36,6 @@ Release date: TBA
 
 * Improve brain for ``typing.Callable`` and ``typing.Type``.
 
-* Fix bug with importing namespace packages with relative imports
-
-  Closes PyCQA/pylint#5059
-
 
 What's New in astroid 2.8.0?
 ============================

astroid/nodes/scoped_nodes.py

@@ -43,7 +43,6 @@
 import builtins
 import io
 import itertools
-import os
 import typing
 from typing import List, Optional, TypeVar
 
@@ -733,17 +732,10 @@ def relative_to_absolute_name(self, modname, level):
         if level:
             if self.package:
                 level = level - 1
-                package_name = self.name.rsplit(".", level)[0]
-            elif not os.path.exists("__init__.py") and os.path.exists(
-                modname.split(".")[0]
-            ):
-                level = level - 1
-                package_name = ""
-            else:
-                package_name = self.name.rsplit(".", level)[0]
             if level and self.name.count(".") < level:
                 raise TooManyLevelsError(level=level, name=self.name)
 
+            package_name = self.name.rsplit(".", level)[0]
         elif self.package:
             package_name = self.name
         else:
@@ -752,7 +744,7 @@ def relative_to_absolute_name(self, modname, level):
         if package_name:
             if not modname:
                 return package_name
-            return f"{package_name}.{modname.split('.')[0]}"
+            return f"{package_name}.{modname}"
         return modname
 
     def wildcard_import_names(self):

tests/unittest_inference.py

@@ -6535,10 +6535,5 @@ def play():
     assert next(node.infer()).pytype() == ".B"
 
 
-def test_namespace_package() -> None:
-    """check that a file using namespace packages and relative imports is parseable"""
-    resources.build_file("data/beyond_top_level/import_package.py")
-
-
 if __name__ == "__main__":
     unittest.main()