Bump pycodestyle from 2.8.0 to 2.9.0 (#3320)

* Bump pycodestyle from 2.8.0 to 2.9.0

Bumps [pycodestyle](https://github.com/PyCQA/pycodestyle) from 2.8.0 to 2.9.0.
- [Release notes](https://github.com/PyCQA/pycodestyle/releases)
- [Changelog](https://github.com/PyCQA/pycodestyle/blob/main/CHANGES.txt)
- [Commits](https://github.com/PyCQA/pycodestyle/compare/2.8.0...2.9.0)

---
updated-dependencies:
- dependency-name: pycodestyle
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* fix mongodb

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Noémi Ványi <sitbackandwait@gmail.com>

requirements-dev.txt

@@ -1,7 +1,7 @@
 mock==4.0.3
 nose2[coverage_plugin]==0.12.0
 cov-core==1.15.0
-pycodestyle==2.8.0
+pycodestyle==2.9.0
 pylint==2.14.5
 splinter==0.18.1
 transifex-client==0.14.3; python_version < '3.10'

searx/engines/mongodb.py

@@ -54,7 +54,7 @@ def search(query, params):
         .limit(results_per_page)
     ret.append({'number_of_results': results.count()})
     for r in results:
-        del(r['_id'])
+        del r['_id']
         r = {str(k): str(v) for k, v in r.items()}
         r['template'] = result_template
         ret.append(r)