strip_code() does not remove interwiki/in other language links

[harej]

Test case is this bot user page on Hungarian Wikipedia: https://hu.wikipedia.org/wiki/Szerkeszt%C5%91:HerculeBot?action=raw

To reproduce:

import mwparserfromhell
import requests
r = requests.get('https://hu.wikipedia.org/wiki/Szerkeszt%C5%91:HerculeBot?action=raw').text
mwparserfromhell.parse(r).strip_code()

Actual behavior:

en:User:HerculeBot
ab:Алахәыла:HerculeBot
ace:Ureuëng Nguy:HerculeBot
af:Gebruiker:HerculeBot
ak:User:HerculeBot
als:Benutzer:HerculeBot
(and so on)

Expected behavior:
No content is returned, seeing as the page just consists of a template and many interwiki links meant to populate the "in other languages" menu and not the article body, and should therefore be filtered out by strip_code().

[earwig]

This is the same underlying issue as #136, with many of the same difficulties. I'm going to merge it into that one.