Remove duplicate regulatory entry (#473)

* Remove duplicate regulatory entry

Author: jhiggins-cpr

docs_robots/outdoor_robots/husky/a300/user_manual_husky.mdx

@@ -1721,7 +1721,6 @@ See [Husky A300 Troubleshooting](troubleshooting_husky.mdx) for details on Husky
 
 - CE-marked
    - EN 61326-1:2013
-   - EN 301 489-1 V1.9.2
    - EN 61010-1:2010, EN 61010-1:2010/A1:2019/AC:2019-04, EN 61010-1:2010/A1:2019
    - EN 301 489-1 V1.9.2
    - EN 301 893 V2.1.1