diff --git a/bench/vendored/ppx_sexp_conv.v0.15.1/ppx_sexp_conv.opam b/bench/vendored/ppx_sexp_conv.v0.15.1/ppx_sexp_conv.opam
deleted file mode 100644
index 5a417d7a5..000000000
--- a/bench/vendored/ppx_sexp_conv.v0.15.1/ppx_sexp_conv.opam
+++ /dev/null
@@ -1,23 +0,0 @@
-opam-version: "2.0"
-version: "v0.15.0"
-maintainer: "Jane Street developers"
-authors: ["Jane Street Group, LLC"]
-homepage: "https://github.com/janestreet/ppx_sexp_conv"
-bug-reports: "https://github.com/janestreet/ppx_sexp_conv/issues"
-dev-repo: "git+https://github.com/janestreet/ppx_sexp_conv.git"
-doc: "https://ocaml.janestreet.com/ocaml-core/latest/doc/ppx_sexp_conv/index.html"
-license: "MIT"
-build: [
-  ["dune" "build" "-p" name "-j" jobs]
-]
-depends: [
-  "ocaml"    {>= "4.08.0"}
-  "base"     {>= "v0.15" & < "v0.16"}
-  "sexplib0" {>= "v0.15" & < "v0.16"}
-  "dune"     {>= "2.0.0"}
-  "ppxlib"   {>= "0.26.0"}
-]
-synopsis: "[@@deriving] plugin to generate S-expression conversion functions"
-description: "
-Part of the Jane Street's PPX rewriters collection.
-"