The procedure of removing VxRail embedded LogInsight varies depending on a version you are using. KB 000021152 describes the procedure for earlier version but not for latest ones. I suppose newer version since 7.0.010 does not need VxRail-specific procedure and you can follow VMware document or KB to do that, but not completely sure. If you have a valid support contract, i would recommend you to open support ticket.
Hi team  We Have some Vxrail  cluster with local log insight , we plan to deploy new  vRealize Log insight  that comes  with the vRealize  suite in management clsuter  ,  I want  to reconfigure all the logs from the vxrail clusters to the new  vRealize Log insights and delete the  vxrails logs insight  from DELL  Vxrail side is their  and official procedure , specially for the vxrail manager logs ?    Regards Sofiane 
vRealize Log Insight for many Vxrail clusters