How to remove Create Team Post and My Team Post from Team Activity Center - MSS

Hi,

We need to remove Create Team Post and My team post dropdown options from Team Actions area in Team Activity Center for MSS view. I tried removing the aggregate privilege "manage my team posts" from the line manager role but the option is still showing on the dropdown. Though now clicking on the option shows " Permission is required to perform this action" . Please help.

Thanks,

Arnab