Drop devel/printmimestructure (it is in mailscripts 0.11)

mailscripts 0.11 now ships a derivative of devel/printmimestructure
called email-print-mime-structure.  Maintenance for that utility will
happen in mailscripts from now on, so we should not track an
independent copy of it in notmuch's source tree.

See https://bugs.debian.org/939993 for more details about the
adoption.

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>

devel/printmimestructure

@@ -1,69 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-# Author: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
-# License: GPLv3+
-
-# This script reads a MIME message from stdin and produces a treelike
-# representation on it stdout.
-
-# Example:
-#
-# 0 dkg@alice:~$ printmimestructure < 'Maildir/cur/1269025522.M338697P12023.monkey,S=6459,W=6963:2,Sa'
-# └┬╴multipart/signed 6546 bytes
-#  ├─╴text/plain inline 895 bytes
-#  └─╴application/pgp-signature inline [signature.asc] 836 bytes
-# 0 dkg@alice:~$
-
-
-# If you want to number the parts, i suggest piping the output through
-# something like "cat -n"
-
-from __future__ import print_function
-
-import email
-import sys
-
-def print_part(z, prefix):
-    fname = '' if z.get_filename() is None else ' [' + z.get_filename() + ']'
-    cset = '' if z.get_charset() is None else ' (' + z.get_charset() + ')'
-    disp = z.get_params(None, header='Content-Disposition')
-    if (disp is None):
-        disposition = ''
-    else:
-        disposition = ''
-        for d in disp:
-            if d[0] in [ 'attachment', 'inline' ]:
-                disposition = ' ' + d[0]
-    if z.is_multipart():
-        nbytes = len(z.as_string())
-    else:
-        nbytes = len(z.get_payload())
-
-    print('{}{}{}{}{} {:d} bytes'.format(
-        prefix,
-        z.get_content_type(),
-        cset,
-        disposition,
-        fname,
-        nbytes,
-    ))
-
-def test(z, prefix=''):
-    if (z.is_multipart()):
-        print_part(z, prefix+'┬╴')
-        if prefix.endswith('└'):
-            prefix = prefix.rpartition('└')[0] + ' '
-        if prefix.endswith('├'):
-            prefix = prefix.rpartition('├')[0] + '│'
-        parts = z.get_payload()
-        i = 0
-        while (i < parts.__len__()-1):
-            test(parts[i], prefix + '├')
-            i += 1
-        test(parts[i], prefix + '└')
-        # FIXME: show epilogue?
-    else:
-        print_part(z, prefix+'─╴')
-
-test(email.message_from_file(sys.stdin), '└')