fix: drop PYTHONSAFEPATH (#2429)

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

cibuildwheel/platforms/linux.py

@@ -361,7 +361,6 @@ def build_in_container(
             virtualenv_env = env.copy()
             virtualenv_env["PATH"] = f"{venv_dir / 'bin'}:{virtualenv_env['PATH']}"
             virtualenv_env["VIRTUAL_ENV"] = str(venv_dir)
-            virtualenv_env["PYTHONSAFEPATH"] = "1"
             virtualenv_env = build_options.test_environment.as_dictionary(
                 prev_environment=virtualenv_env
             )

cibuildwheel/platforms/macos.py

@@ -648,9 +648,6 @@ def build(options: Options, tmp_path: Path) -> None:
 
                     virtualenv_env["MACOSX_DEPLOYMENT_TARGET"] = get_test_macosx_deployment_target()
 
-                    # see https://github.com/pypa/cibuildwheel/issues/2358 for discussion
-                    virtualenv_env["PYTHONSAFEPATH"] = "1"
-
                     virtualenv_env = build_options.test_environment.as_dictionary(
                         prev_environment=virtualenv_env
                     )

cibuildwheel/platforms/pyodide.py

@@ -484,8 +484,6 @@ def build(options: Options, tmp_path: Path) -> None:
                 )
                 virtualenv_env["VIRTUAL_ENV"] = str(venv_dir)
 
-                virtualenv_env["PYTHONSAFEPATH"] = "1"
-
                 virtualenv_env = build_options.test_environment.as_dictionary(
                     prev_environment=virtualenv_env
                 )

cibuildwheel/platforms/windows.py

@@ -553,9 +553,6 @@ def build(options: Options, tmp_path: Path) -> None:
                     pip_version=pip_version,
                 )
 
-                # see https://github.com/pypa/cibuildwheel/issues/2358 for discussion
-                virtualenv_env["PYTHONSAFEPATH"] = "1"
-
                 virtualenv_env = build_options.test_environment.as_dictionary(
                     prev_environment=virtualenv_env
                 )