Remove HBR as it uses a captcha on its sign in form

Bloody insanity.

recipes/hbr.recipe

@@ -1,87 +0,0 @@
-#!/usr/bin/env python
-# vim:fileencoding=utf-8
-# License: GPLv3 Copyright: 2016, Kovid Goyal <kovid at kovidgoyal.net>
-
-from calibre.web.feeds.news import BasicNewsRecipe
-from css_selectors import Select
-from mechanize import Request
-import json
-try:
-    from urllib.parse import urlencode
-except ImportError:
-    from urllib import urlencode
-
-
-class HBR(BasicNewsRecipe):
-
-    title = 'Harvard Business Review'
-    description = 'To subscribe go to http://hbr.harvardbusiness.org'
-    needs_subscription = True
-    __author__ = 'Kovid Goyal'
-    timefmt = ' [%B %Y]'
-    language = 'en'
-    no_stylesheets = True
-
-    keep_only_tags = [
-        dict(attrs={'class': ['article-hed', 'byline']}),
-        dict(attrs={'class': lambda x: x and 'article' in x.split()}),
-    ]
-    remove_tags = [
-        dict(name='personalization-placement'),
-    ]
-
-    def get_browser(self):
-        br = BasicNewsRecipe.get_browser(self)
-        # br.set_debug_http(True)
-        br.open('https://hbr.org/sign-in')
-        rq = Request('https://hbr.org/authenticate', headers={
-            'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
-            'Referer': 'https://hbr.org/sign-in',
-            'Origin': 'https://hbr.org',
-            'X-Requested-With': 'XMLHttpRequest',
-            'Accept': 'application/json, text/javascript, */*; q=0.01',
-        }, data=urlencode({'username': self.username, 'password': self.password}))
-        r = br.open(rq)
-        raw = r.read()
-        data = json.loads(raw)
-        if data['code'] != 200 or data["message"] != "Authentication Successful.":
-            raise ValueError('Failed to log in check username/password')
-        return br
-
-    def hbr_parse_toc(self, url):
-        root = self.index_to_soup(url, as_tree=True)
-        select = Select(root)
-        section = 'Unknown'
-        articles = []
-        feeds = []
-        toc = next(
-            select('stream-content[data-stream-name="table-of-contents"] ul'))
-        for x in toc.xpath('descendant::*[local-name()="h4" or local-name()="stream-item"]'):
-            if 'h4' in x.tag:
-                if articles:
-                    feeds.append((section, articles))
-                section = self.tag_to_string(x)
-                articles = []
-                self.log('Found section:', section)
-            else:
-                title, url = x.get('data-title'), x.get('data-url')
-                desc = ''.join(c.tail or '' for c in x).strip()
-                authors = x.get('data-authors')
-                if authors:
-                    desc = 'by ' + authors + ': ' + desc
-                self.log('\tFound article:', title, url, desc)
-                articles.append(
-                    {'title': title, 'url': 'https://hbr.org' + url, 'description': desc})
-        if articles:
-            feeds.append((section, articles))
-        return feeds
-
-    def parse_index(self):
-        soup = self.index_to_soup('http://hbr.org/magazine')
-        fig = soup.find('figure', attrs={
-                        'class': lambda x: x and 'current-issue' in x.split()})
-        url = 'https://hbr.org' + fig.find('a', href=True)['href']
-        img = fig.find('img')
-        self.cover_url = 'https://hbr.org' + img['src']
-        self.timefmt = img['alt']
-        return self.hbr_parse_toc(url)