dev-cpp/robin-hood-hashing: Drop old versions

Signed-off-by: Matt Turner <mattst88@gentoo.org>

dev-cpp/robin-hood-hashing/robin-hood-hashing-3.11.5-r1.ebuild

@@ -1,23 +0,0 @@
-# Copyright 1999-2022 Gentoo Authors
-# Distributed under the terms of the GNU General Public License v2
-
-EAPI=7
-
-inherit cmake
-
-KEYWORDS="amd64 arm arm64 ~loong ppc ppc64 ~riscv x86"
-SRC_URI="https://github.com/martinus/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
-
-DESCRIPTION="Fast & memory efficient hashtable based on robin hood hashing for C++11/14/17/20"
-HOMEPAGE="https://github.com/martinus/robin-hood-hashing"
-
-LICENSE="MIT"
-SLOT="0"
-
-src_configure() {
-	local mycmakeargs=(
-		-DRH_STANDALONE_PROJECT=OFF
-		-DCMAKE_INSTALL_LIBDIR="${EPREFIX}/usr/share/"
-	)
-	cmake_src_configure
-}