Move deprecation-emitting import out of module scope in untestsed module.

src/Products/MIMETools/MIMETag.py

@@ -15,7 +15,6 @@ __version__='$Revision: 1.12 $'[11:-2]
 
 from DocumentTemplate.DT_Util import *
 from DocumentTemplate.DT_String import String
-from MimeWriter import MimeWriter
 from cStringIO import StringIO
 import mimetools
 
@@ -127,6 +126,7 @@ class MIMETag:
 
 
     def render(self, md):
+        from MimeWriter import MimeWriter # deprecated since Python 2.3!
         contents=[]
         IO = StringIO()
         IO.write("Mime-Version: 1.0\n")