Revert "Add Wikipedia data source: script and README documentation"

This reverts commit 5da8ea2.

Author: TimidRobot

sources.md

@@ -174,35 +174,3 @@ adjust video parameters, and obtain search results.
   - API key required
   - Query limit: depends on the type and number of requests
   - Data available through JSON format
-
-## 📖 Wikipedia Data Source
-
-Quantifying now supports fetching data from Wikipedia as an additional source alongside GitHub and Google Custom Search.
-
-### Available Statistics
-
-- **Number of articles** – Total articles on Wikipedia.
-- **Number of pages** – Total pages, including non-article pages.
-- **Number of edits** – Total edits across Wikipedia.
-- **Number of users** – Total registered users.
-- **Number of images** – Total uploaded images.
-- **Keyword-based counts** – Number of articles referencing specific Creative Commons licenses or keywords.
-
-### Example Usage
-
-```python
-from scripts.wikipedia_fetch import get_site_statistics, search_articles_count, fetch_cc_related_statistics
-
-# General Wikipedia statistics
-stats = get_site_statistics()
-print("Wikipedia Site Stats:", stats)
-
-# Count articles containing a specific keyword
-cc_articles = search_articles_count("Creative Commons")
-print("Articles with 'Creative Commons':", cc_articles)
-
-# Fetch counts for various Creative Commons licenses
-cc_stats = fetch_cc_related_statistics()
-for license_name, count in cc_stats.items():
-    print(f"{license_name}: {count}")
-