Can you try the following?  Let us know if it doesn't fix the problem.

1. Open Google Chrome web browser and type chrome://flags/ in addressbar and press Enter. It'll open the advanced configuration page.
2. Now type managed in the "Search flags" box.
It'll directly go to following option:
3. To disable/remove the "Managed by your organization" message in Chrome, select Disabled from the drop-down box.
Disable_Remove_Managed_By_Your_Organization_Message_Google_Chrome.png
4. Google Chrome will ask you to restart the browser. Click on "Relaunch now" button to restart Google Chrome.

Thanks,

Doug