Remove Column Security Definitions
To remove column security for a data source:
Log into Composer as a Composer administrator, a user in a group that has been granted the Can Administer Sourcesprivilege, or a user in a group that has been granted the Can Manage Source Permissionsprivilege and who also has readpermission for the data source.
If the user name you log in with is also associated with other Composer accounts, verify that the correct account is selected. See Switch Accounts.
Locate the data source and select in the Column column for the data source. The Column Security dialog appears.
Locate the column security definition you want to remove (delete) on the left side of the Column Security dialog and select next to its name.
Select on the confirmation dialog. The column security definition is removed.
When all column security definition modifications have been made, select to close the Column Security dialog.