REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2301

This interface was a originally a no-op in python 3, and now
is fully removed causing a build warning on macOS (Darwin).

Signed-off-by: Vitaly Cheptsov <vit9696@protonmail.com>>
---
 BaseTools/Source/Python/sitecustomize.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/BaseTools/Source/Python/sitecustomize.py b/BaseTools/Source/Python/sitecustomize.py
index 7dbbf8a232..50783e1b3a 100644
--- a/BaseTools/Source/Python/sitecustomize.py
+++ b/BaseTools/Source/Python/sitecustomize.py
@@ -7,7 +7,7 @@
 import sys
 import locale
 
-if sys.platform == "darwin":
+if sys.platform == "darwin" and sys.version_info[0] < 3:
   DefaultLocal = locale.getdefaultlocale()[1]
   if DefaultLocal is None:
     DefaultLocal = 'UTF8'
-- 
2.21.0 (Apple Git-122)