getpass: update docstrings (GH-49) (GH-419)

(cherry picked from commit baf7bb30a02aabde260143136bdf5b3738a1d409)
diff --git a/Lib/getpass.py b/Lib/getpass.py
index be51121..36e17e4 100644
--- a/Lib/getpass.py
+++ b/Lib/getpass.py
@@ -7,7 +7,6 @@
                  echoing of the password contents while reading.
 
 On Windows, the msvcrt module will be used.
-On the Mac EasyDialogs.AskPassword is used, if available.
 
 """