dev-R/*: remove AR export no more needed

Signed-off-by: Alessandro Barbieri <lssndrbarbieri@gmail.com>

dev-R/RInside/RInside-0.2.16.ebuild

@@ -3,7 +3,7 @@
 
 EAPI=7
 
-inherit R-packages toolchain-funcs
+inherit R-packages
 
 DESCRIPTION='C++ Classes to Embed R in C++ (and C) Applications'
 KEYWORDS="~amd64"
@@ -18,11 +18,6 @@ DEPEND="
 "
 RDEPEND="${DEPEND}"
 
-src_prepare() {
-	tc-export AR
-	R-packages_src_prepare
-}
-
 src_install() {
 	R-packages_src_install
 	find "${D}" -name "*.a" -delete || die