From the ArchWiki: > To remove a package and its dependencies which are not required by any other installed package: > # pacman -Rs package_name > To remove

From the ArchWiki: > To remove a package and its dependencies which are not required by any other installed package: > # pacman -Rs package_name > To remove a package, its dependencies and all the packages that depend on the target package: > # pacman -Rsc package_name