Revert "Fix bug in Magic when destructor called too early"

This reverts commit 16972c2.

Author: jspricke

magic/__init__.py

@@ -53,8 +53,6 @@ def __init__(self, mime=False, magic_file=None, mime_encoding=False,
         raw - Do not try to decode "non-printable" chars.
         extension - Print a slash-separated list of valid extensions for the file type found.
         """
-
-        self.cookie = None
         self.flags = MAGIC_NONE
         if mime:
             self.flags |= MAGIC_MIME_TYPE