dev-scheme/guile-ncurses: drop useless static-libs USE flag

as QA requested
https://projects.gentoo.org/qa/policy-guide/installed-files.html#pg0302

Signed-off-by: Maciej Barć <xgqt@gentoo.org>

dev-scheme/guile-ncurses/guile-ncurses-3.0-r3.ebuild

@@ -12,7 +12,6 @@ SRC_URI="mirror://gnu/guile-ncurses/${P}.tar.gz"
 LICENSE="LGPL-3+"
 SLOT="0"
 KEYWORDS="~amd64 ~x86"
-IUSE="static-libs"
 RESTRICT="strip"
 
 RDEPEND="
@@ -63,10 +62,6 @@ src_prepare() {
 	eautoreconf  # 843560
 }
 
-src_configure() {
-	econf $(use_enable static-libs static)
-}
-
 src_test() {
 	emake check
 }
@@ -74,7 +69,5 @@ src_test() {
 src_install() {
 	default
 
-	if ! use static-libs ; then
-		find "${ED}" -type f -name '*.la' -delete || die
-	fi
+	find "${ED}" -type f -name '*.la' -delete || die
 }