Revert inappropriate doc change.
diff --git a/Doc/library/email.message.rst b/Doc/library/email.message.rst
index 9fead22..0e79b6c 100644
--- a/Doc/library/email.message.rst
+++ b/Doc/library/email.message.rst
@@ -112,9 +112,6 @@
       *decode* flag is ``True``, then ``None`` is returned.  The default for
       *decode* is ``False``.
 
-      To pass a value for the decode flag to a non-multipart message, specify
-      ``None`` as the value of *i*.
-
 
    .. method:: set_payload(payload[, charset])