Any way to remove columns in the users page?

[Canapin (Coin-coin le Canapin)]

What you want to achieve can be done by overriding the existing page templates. There is an example of a column removal here:

Beginner's guide to developing Discourse Themes

So, you want to create Discourse themes? Not sure where to start? Or maybe you have created Discourse themes before, but want to learn how to do even more cool things. Well, you’ve come to the right place Developer’s guide to Discourse Themes Subjects include a general overview of Discourse themes, creating and sharing Discourse themes, theme development examples, searching for and finding information / examples in the Discourse repository, and best practices. Prerequisites: …