So you just installed Garuda Linux and want to know how to get rid of packages you dont use? Its quite easy.
Open up Pamac via its startmenu shortcut and change some setting related to how orphaned packages are being treated by Pamac. These are then being removed automatically instead of remaining installed.
Then head over to the “explicitly installed apps" tab. Here you can select the packages you want to get rid of. You could for example remove AMD video drivers if you are running on Intel hardware and vice versa.
Make sure to inspect the list of uninstalled apps carefully prior to removing them!!