diff --git a/sdk_container/src/third_party/coreos-overlay/eclass/coreos-go-lang.eclass b/sdk_container/src/third_party/coreos-overlay/eclass/coreos-go-lang.eclass
deleted file mode 100644
index e5f34fe9d2..0000000000
--- a/sdk_container/src/third_party/coreos-overlay/eclass/coreos-go-lang.eclass
+++ /dev/null
@@ -1,121 +0,0 @@
-# Copyright 2016 CoreOS, Inc.
-# Distributed under the terms of the GNU General Public License v2
-
-# @ECLASS: coreos-go-lang.eclass
-# @BLURB: Common functionality for building Go itself
-# @DESCRIPTION:
-# Only dev-lang/go ebuilds should inherit this eclass.
-#
-# Native (${CHOST} == ${CTARGET}):
-# 
-
-case "${EAPI:-0}" in
-	6|7|8) ;;
-	*) die "Unsupported EAPI=${EAPI} for ${ECLASS}"
-esac
-
-inherit coreos-go-utils toolchain-funcs
-
-export CBUILD=${CBUILD:-${CHOST}}
-export CTARGET=${CTARGET:-${CHOST}}
-
-# Determine the main SLOT we will be using, e.g.: PV=1.5.3 SLOT=1.5
-GOSLOT="$(ver_cut 1-2)"
-
-DESCRIPTION="A concurrent garbage collected and typesafe programming language"
-HOMEPAGE="http://www.golang.org"
-SRC_URI="https://storage.googleapis.com/golang/go${PV}.src.tar.gz"
-
-LICENSE="BSD"
-SLOT="${GOSLOT}/${PV}"
-IUSE=""
-
-RDEPEND="app-eselect/eselect-go"
-DEPEND="${RDEPEND}
-	>=dev-lang/go-bootstrap-1.17.13"
-
-# These test data objects have writable/executable stacks.
-QA_EXECSTACK="usr/lib/go${GOSLOT}/src/debug/elf/testdata/*.obj"
-
-# Similarly, test data is never executed so don't check link dependencies.
-REQUIRES_EXCLUDE="/usr/lib/go/src/debug/elf/testdata/*"
-
-# The tools in /usr/lib/go should not cause the multilib-strict check to fail.
-QA_MULTILIB_PATHS="usr/lib/go${GOSLOT}/pkg/tool/.*/.*"
-
-# The go language uses *.a files which are _NOT_ libraries and should not be
-# stripped. The test data objects should also be left alone and unstripped.
-STRIP_MASK="*.a /usr/lib/go${GOSLOT}/src/*"
-
-S="${WORKDIR}/go"
-
-coreos-go-lang_pkg_pretend() {
-	# make.bash does not understand cross-compiling a cross-compiler
-	if [[ $(go_tuple) != $(go_tuple ${CTARGET}) ]]; then
-		die "CHOST CTARGET pair unsupported: CHOST=${CHOST} CTARGET=${CTARGET}"
-	fi
-}
-
-coreos-go-lang_src_compile() {
-	export GOROOT_BOOTSTRAP="${EPREFIX}/usr/lib/go-bootstrap"
-	export GOROOT_FINAL="${EPREFIX}/usr/lib/go${GOSLOT}"
-	export GOROOT="${S}"
-	export GOBIN="${GOROOT}/bin"
-
-	# Go's build script does not use BUILD/HOST/TARGET consistently. :(
-	go_export
-	export GOHOSTARCH=$(go_arch ${CBUILD})
-	export GOHOSTOS=$(go_os ${CBUILD})
-	export CC_FOR_TARGET=$(tc-getCC)
-	export CXX_FOR_TARGET=$(tc-getCXX)
-	# Must be set *after* calling tc-getCC
-	export CC=$(tc-getBUILD_CC)
-
-	cd src
-	./make.bash || die "build failed"
-}
-
-coreos-go-lang_src_test() {
-	go_cross_compile && return 0
-
-	cd src
-	PATH="${GOBIN}:${PATH}" \
-		./run.bash -no-rebuild || die "tests failed"
-}
-
-coreos-go-lang_src_install() {
-	exeinto "/usr/lib/go${GOSLOT}/bin"
-	if go_cross_compile; then
-		doexe "${GOBIN}/$(go_tuple)/"{go,gofmt}
-	else
-		doexe "${GOBIN}/"{go,gofmt}
-	fi
-	dosym "../lib/go${GOSLOT}/bin/go" "/usr/bin/go${GOSLOT}"
-	dosym "../lib/go${GOSLOT}/bin/gofmt" "/usr/bin/gofmt${GOSLOT}"
-
-	exeinto "/usr/lib/go${GOSLOT}/pkg/tool/$(go_tuple)"
-	doexe "pkg/tool/$(go_tuple)/"*
-
-	insopts -m0644 -p # preserve timestamps
-	insinto "/usr/lib/go${GOSLOT}"
-	doins -r doc lib src
-	insinto "/usr/lib/go${GOSLOT}/pkg"
-	doins -r "pkg/include"
-
-	# Install pkg/linux_{amd64,arm64} only for Go <= 1.19, as Go 1.20+
-	# does not ship pre-compiled package archives for the standard library
-	# in $GOROOT/pkg. See https://go.dev/doc/go1.20.
-	ver_test "${GOSLOT}" -lt 1.20 && doins -r "pkg/$(go_tuple)"
-
-	dodoc CONTRIBUTING.md PATENTS README.md
-}
-
-coreos-go-lang_pkg_postinst() {
-	eselect go update
-}
-
-coreos-go-lang_pkg_postrm() {
-	eselect go update
-}
-
-EXPORT_FUNCTIONS pkg_pretend src_compile src_test src_install pkg_postinst pkg_postrm