remove roadmap from footer (#3404)

Author: guimachiavelli

docs.json

@@ -71,10 +71,6 @@
             "label": "Documentation",
             "href": "https://www.meilisearch.com/docs"
           },
-          {
-            "label": "Roadmap",
-            "href": "https://roadmap.meilisearch.com"
-          },
           {
             "label": "Release notes",
             "href": "https://updates.cloud.meilisearch.com/"