diff --git a/bin/rdbg b/bin/rdbg
deleted file mode 100755
--- a/bin/rdbg
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/sh
-set -eu
-
-install_it() {
-  [ -w "$(gem env gemdir)" ] ||
-    opt="--user-install"
-
-  gem install -q ${opt:-} "debug:>=1.0.0"
-  asdf reshim ruby || :
-}
-
-. ~/.lib/sh/stubexec.sh