Remove call to update certs

[techknowlogick]

fix #3865 and also recover try.gitea.io

replaces: #4293

[techknowlogick]

ping @inful A read-only mount to /etc/ssl/certs/ca-certificates.crt will resolve the same issue you were facing.

[codecov-io]

Codecov Report

Merging #4296 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4296   +/-   ##
=======================================
  Coverage   20.09%   20.09%           
=======================================
  Files         153      153           
  Lines       30696    30696           
=======================================
  Hits         6168     6168           
  Misses      23586    23586           
  Partials      942      942

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[tboerger]

@inful that's a snippet from my Gitea docker-compose deployment:

  server:
    image: gitea/gitea:1.4.2
    restart: always
    networks:
      - traefik
      - gitea
    labels:
      - traefik.docker.network=traefik
      - traefik.port=3000
      - traefik.frontend.passHostHeader=true
      - traefik.frontend.rule=Host:${GITEA_DOMAINS}
    healthcheck:
      test: ["NONE"]
      interval: 30s
      timeout: 10s
      retries: 5
    volumes:
      - /etc/ssl/certs/ca-certificates.crt:/etc/ssl/certs/ca-certificates.crt:ro
      - git:/data/git
      - gitea:/data/gitea
      - ssh:/data/ssh
    ports:
      - ${GITEA_SSH_PORT}:22
    depends_on:
      - db