Remove Searx (the project is archived) (#128)

- ref. #1 
- 276ffd3f01
- no further explanations provided
- searxng looks like a suitable replacement

software/searx.yml

@@ -1,14 +0,0 @@
-name: Searx
-website_url: https://searx.github.io/searx/
-description: Privacy-respecting, hackable metasearch engine.
-licenses:
-  - AGPL-3.0
-platforms:
-  - Python
-tags:
-  - Search Engines
-source_code_url: https://github.com/searx/searx
-depends_3rdparty: true
-stargazers_count: 13149
-updated_at: '2023-09-07'
-archived: true