Remove duplicate "import os"
diff --git a/Lib/asyncore.py b/Lib/asyncore.py
index fe24977..96cc9cc 100644
--- a/Lib/asyncore.py
+++ b/Lib/asyncore.py
@@ -511,7 +511,6 @@
 #
 # Regardless, this is useful for pipes, and stdin/stdout...
 
-import os
 if os.name == 'posix':
     import fcntl