Revert "[feat] add HEALTHCHECK in Dockerfile"

This reverts commit dabe425499.

Dockerfile

@@ -62,8 +62,6 @@ RUN su searxng -c "/usr/bin/python3 -m compileall -q searx" \
     -o -name '*.svg' -o -name '*.ttf' -o -name '*.eot' \) \
     -type f -exec gzip -9 -k {} \+ -exec brotli --best {} \+
 
-HEALTHCHECK CMD wget --quiet --tries=1 --spider http://localhost:8080/healthz || exit 1
-
 # Keep these arguments at the end to prevent redundant layer rebuilds
 ARG LABEL_DATE=
 ARG GIT_URL=unknown