chore: Do not throw in config file

Author: javierbrea

markdown-confluence-sync.config.js

@@ -2,10 +2,6 @@
 
 const DOCS_HOST = process.env.DOCS_HOST;
 
-if (!DOCS_HOST) {
-  throw new Error("DOCS_HOST environment variable is not set");
-}
-
 module.exports = {
   confluence: {
     noticeTemplate: `NOTICE: This page is synced automatically with content from <a href="${DOCS_HOST}/docs/{{relativePathWithoutExtension}}.html" target="_blank">${DOCS_HOST}/docs/{{relativePathWithoutExtension}}.html</a>. Changes made manually will be lost, you should <a href="https://github.com/Telefonica/cross-idp/edit/main/components/website-static/docs/{{relativePath}}" target="_blank">edit this page in Github</a> instead.`,