In Sugester you can edit columns in tasks' column view. You can add new columns, hide them in column view or delete them, if a column is no longer needed or was created by accident. To do that, just select
Settings > Account settings > Statuses.
Next, click on
cog icon in top right corner and
'Task statuses'. Select
'Edit' or
'Delete' - depending on what you want to do.

If you just want to hide a column, unfold
'More' and unmark
'Column' checkbox.