diff --git a/extra/go/build b/extra/go/build
deleted file mode 100755
index 38a898cb..00000000
--- a/extra/go/build
+++ /dev/null
@@ -1,63 +0,0 @@
-#!/bin/sh -e
-
-export GOARCH=amd64
-export GO_LDFLAGS="-w -s"
-
-[ -f "$KISS_ROOT/var/db/kiss/installed/go/manifest" ] || {
-    export GOROOT=$PWD/go1.4-bootstrap
-    export GOROOT_FINAL=$PWD/lib/go-bootstrap
-
-    mkdir -p lib/go-bootstrap
-
-    cd "$GOROOT/src"
-    bash ./make.bash
-    cd ..
-    cp -a bin pkg src ../lib/go-bootstrap
-    cd ..
-}
-
-export GOROOT_FINAL=/usr/lib/go
-
-if [ -f "$KISS_ROOT/var/db/kiss/go/manifest" ]; then
-    export GOROOT_BOOTSTRAP=/usr/lib/go
-else
-    export GOROOT_BOOTSTRAP=$PWD/lib/go-bootstrap
-fi
-
-export GOROOT=$PWD/go-current
-
-(
-    cd "$GOROOT/src"
-    bash make.bash --no-clean -v
-)
-
-cd "$GOROOT"
-
-mkdir -p "$1/usr/bin" "$1/usr/lib/go/bin"
-
-install -m755 "bin/go"    "$1/usr/lib/go/bin/go"
-install -m755 "bin/gofmt" "$1/usr/lib/go/bin/gofmt"
-
-ln -s "/usr/lib/go/bin/go"    "$1/usr/bin"
-ln -s "/usr/lib/go/bin/gofmt" "$1/usr/bin"
-
-cp -a misc pkg src lib "$1/usr/lib/go"
-
-# Remove unneeded files.
-rm -f  "$1/usr/share/go/doc/articles/wiki/get.bin"
-rm -f  "$1/usr/lib/go/pkg/tool/"*/api
-rm -rf "$1/usr/lib/go/pkg/bootstrap"
-rm -rf "$1/usr/lib/go/pkg/obj"
-
-cd "$1/usr/lib/go/src"
-
-# Remove tests.
-find . -type f -a -name \*_test.go -delete
-find . -type f -a -name \*.bash    -delete
-find . -type f -a -name \*.bat     -delete
-find . -type f -a -name \*.rc      -delete
-
-find . -type d -a -name testdata |
-    while read -r dir; do
-        rm -rf "$dir"
-    done
diff --git a/extra/go/checksums b/extra/go/checksums
deleted file mode 100644
index 54a88d49..00000000
--- a/extra/go/checksums
+++ /dev/null
@@ -1,2 +0,0 @@
-81f154e69544b9fa92b1475ff5f11e64270260d46e7e36c34aafc8bc96209358  go1.13.1.src.tar.gz
-f4ff5b5eb3a3cae1c993723f3eab519c5bae18866b5e5f96fe1102f0cb5c3e52  go1.4-bootstrap-20171003.tar.gz
diff --git a/extra/go/depends b/extra/go/depends
deleted file mode 100644
index 82a3ccad..00000000
--- a/extra/go/depends
+++ /dev/null
@@ -1 +0,0 @@
-bash make
diff --git a/extra/go/nostrip b/extra/go/nostrip
deleted file mode 100644
index e69de29b..00000000
diff --git a/extra/go/sources b/extra/go/sources
deleted file mode 100644
index 278d76e5..00000000
--- a/extra/go/sources
+++ /dev/null
@@ -1,2 +0,0 @@
-https://golang.org/dl/go1.13.1.src.tar.gz go-current
-https://dl.google.com/go/go1.4-bootstrap-20171003.tar.gz go1.4-bootstrap
diff --git a/extra/go/version b/extra/go/version
deleted file mode 100644
index 9c812821..00000000
--- a/extra/go/version
+++ /dev/null
@@ -1 +0,0 @@
-1.13.1 1