Remove some engines : subtitleseeker, seedpeer, swisscows

http://www.subtitleseeker.com and http://www.seedpeer.eu don't exist anymore.
https://swisscows.ch/ has change : the engine needs to be updated

searx/engines/swisscows.py

@@ -1,125 +0,0 @@
-"""
- Swisscows (Web, Images)
-
- @website     https://swisscows.ch
- @provide-api no
-
- @using-api   no
- @results     HTML (using search portal)
- @stable      no (HTML can change)
- @parse       url, title, content
-"""
-
-from json import loads
-import re
-from lxml.html import fromstring
-from searx.url_utils import unquote, urlencode
-from searx.utils import match_language
-
-# engine dependent config
-categories = ['general', 'images']
-paging = True
-language_support = True
-
-# search-url
-base_url = 'https://swisscows.ch/'
-search_string = '?{query}&page={page}'
-
-supported_languages_url = base_url
-
-# regex
-regex_json = re.compile(b'initialData: {"Request":(.|\n)*},\s*environment')
-regex_json_remove_start = re.compile(b'^initialData:\s*')
-regex_json_remove_end = re.compile(b',\s*environment$')
-regex_img_url_remove_start = re.compile(b'^https?://i\.swisscows\.ch/\?link=')
-
-
-# do search-request
-def request(query, params):
-    if params['language'] == 'all':
-        ui_language = 'browser'
-        region = 'browser'
-    else:
-        region = match_language(params['language'], supported_languages, language_aliases)
-        ui_language = region.split('-')[0]
-
-    search_path = search_string.format(
-        query=urlencode({'query': query, 'uiLanguage': ui_language, 'region': region}),
-        page=params['pageno']
-    )
-
-    # image search query is something like 'image?{query}&page={page}'
-    if params['category'] == 'images':
-        search_path = 'image' + search_path
-
-    params['url'] = base_url + search_path
-
-    return params
-
-
-# get response from search-request
-def response(resp):
-    results = []
-
-    json_regex = regex_json.search(resp.text)
-
-    # check if results are returned
-    if not json_regex:
-        return []
-
-    json_raw = regex_json_remove_end.sub(b'', regex_json_remove_start.sub(b'', json_regex.group()))
-    json = loads(json_raw.decode('utf-8'))
-
-    # parse results
-    for result in json['Results'].get('items', []):
-        result_title = result['Title'].replace(u'\uE000', '').replace(u'\uE001', '')
-
-        # parse image results
-        if result.get('ContentType', '').startswith('image'):
-            img_url = unquote(regex_img_url_remove_start.sub(b'', result['Url'].encode('utf-8')).decode('utf-8'))
-
-            # append result
-            results.append({'url': result['SourceUrl'],
-                            'title': result['Title'],
-                            'content': '',
-                            'img_src': img_url,
-                            'template': 'images.html'})
-
-        # parse general results
-        else:
-            result_url = result['Url'].replace(u'\uE000', '').replace(u'\uE001', '')
-            result_content = result['Description'].replace(u'\uE000', '').replace(u'\uE001', '')
-
-            # append result
-            results.append({'url': result_url,
-                            'title': result_title,
-                            'content': result_content})
-
-    # parse images
-    for result in json.get('Images', []):
-        # decode image url
-        img_url = unquote(regex_img_url_remove_start.sub(b'', result['Url'].encode('utf-8')).decode('utf-8'))
-
-        # append result
-        results.append({'url': result['SourceUrl'],
-                        'title': result['Title'],
-                        'content': '',
-                        'img_src': img_url,
-                        'template': 'images.html'})
-
-    # return results
-    return results
-
-
-# get supported languages from their site
-def _fetch_supported_languages(resp):
-    supported_languages = []
-    dom = fromstring(resp.text)
-    options = dom.xpath('//div[@id="regions-popup"]//ul/li/a')
-    for option in options:
-        code = option.xpath('./@data-search-language')[0]
-        if code.startswith('nb-'):
-            code = code.replace('nb', 'no', 1)
-        supported_languages.append(code)
-
-    return supported_languages