Remove Date column from posts & category pages

Hello,

My theme displays date, category and author info in a column on the left of posts. I would like to remove this column. I’ve removed the date etc using a plugin, but the space still shows up.

Here’s a page – https://cosmicairport.com/dying-for-truth/ – notice the white space on the left of the image and post content… and same for categories https://cosmicairport.com/category/articles/

What can I do to remove that space?

Thanks,
Ashwita