I do not see option to hide a column in repeat layout in Pega 7.1.7. If you want to hide a column based on a condition then it seems we have to create two grids (one of these without a column that needs to be hidden) and have visibility condition.
Seems there is no configuration option available to hide a column like row visibility option. Do you have to hide a column based on a certain condition? Then only option seems is to use two grid layouts and apply that condition.
How are you able to achieve it by using report definition? Excluded that column in Report definition or able to add column visibility condition on grid configuration?
So if I understand correctly you want to hide column in all scenarios, there is no specific condition. In that case just deleting entire column should work for you right? Did you try deleting the column from grid?