Stop sharing a subroutine
Accounts having the "Share content" permission can share private subroutines with other accounts in the system. See Share a subroutine
Sharing a subroutine can be stopped either per account or for all accounts at once.
To stop sharing a subroutine for all accounts at once, right-click on the subroutine and choose the "Stop sharing" option:
To stop sharing the subroutine per account, otherwise choose the "Edit sharing" option:
Uncheck accounts to stop sharing with them.