dev-R: match eclass changes

Package-Manager: Portage-3.0.19, Repoman-3.0.3
Signed-off-by: Alessandro Barbieri <lssndrbarbieri@gmail.com>

dev-R/assertthat/assertthat-0.2.1.ebuild

@@ -1,13 +1,11 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI="7"
 
-inherit R-packages-guru
+inherit R-packages
 
 DESCRIPTION='Easy Pre and Post Assertions'
 HOMEPAGE="https://cran.r-project.org/package=assertthat"
-SRC_URI="mirror://cran/src/contrib/assertthat_0.2.1.tar.gz"
 LICENSE='GPL-3'
 KEYWORDS="~amd64"
-IUSE="${IUSE-}"