Remove regen_map.py references from Dockerfile and README

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

build/Dockerfile

@@ -11,7 +11,7 @@ WORKDIR /app
 
 COPY scrape_and_map.py scrape_realingo.py scrape_bezrealitky.py \
      scrape_idnes.py scrape_psn.py scrape_cityhome.py \
-     merge_and_map.py regen_map.py generate_status.py scraper_stats.py \
+     merge_and_map.py generate_status.py scraper_stats.py \
      run_all.sh server.py ./
 
 COPY build/crontab /etc/crontabs/root