title: Error response from daemon: bridge is a pre-defined network and cannot be removed
body: <p>CentOS 7</p>
  <p>Docker 20.10</p>
  <p>I want to delete all networks.</p>
  <pre><code>docker container ls
  CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
  </code></pre>
  <p>As you can see no containers. I was removed it before.
  I try this:</p>
  <pre><code>docker network ls
  NETWORK ID     NAME      DRIVER    SCOPE
  1b6758d38df3   bridge    bridge    local
  89dea066d590   host      host      local
  8e235018309e   none      null      local
  </code></pre>
  <p>And this:</p>
  <pre><code>docker network rm 1b6758d38df3
  Error response from daemon: bridge is a pre-defined network and cannot be removed
  </code></pre>
  <p>P.S the folder <code>/var/lib/docker</code> is empty</p>