[fix] prepare for pylint 2.14.0

Remove issue reported by Pylint 2.14.0:

- no-self-use: has been moved to optional extension [1]
- The refactoring checker now also raises 'consider-using-generator' messages
  for max(), min() and sum(). [2]

.pylintrc:
  - <option name>-hint has been removed since long, Pylint 2.14.0 raises an
    error on invalid options
  - bad-continuation and bad-whitespace have been removed [3]

[1] https://pylint.pycqa.org/en/latest/whatsnew/2/2.14/summary.html#removed-checkers
[2] https://pylint.pycqa.org/en/latest/whatsnew/2/2.14/full.html#what-s-new-in-pylint-2-14-0
[2] https://pylint.pycqa.org/en/latest/whatsnew/2/2.6/summary.html#summary-release-highlights

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/infopage/__init__.py

@@ -81,7 +81,7 @@ class InfoPage:
             MarkdownIt("commonmark", {"typographer": True}).enable(["replacements", "smartquotes"]).render(self.content)
         )
 
-    def get_ctx(self):  # pylint: disable=no-self-use
+    def get_ctx(self):
         """Jinja context to render :py:obj:`InfoPage.content`"""
 
         def _md_link(name, url):