diff --git a/.gitignore b/.gitignore
index f47edb20f..2663c06e3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,15 +5,6 @@ src/unix/discover_arguments
 # OPAM 2.0 local switches.
 _opam
 
-# NPM.
-node_modules/
-package-lock.json
-# package-lock.json should probably be committed once we know what we're doing.
-
-# esy
-_esy
-esy.lock
-
 # Coverage analysis.
 bisect*.out
 _coverage/
diff --git a/esy.json b/esy.json
deleted file mode 100644
index ffa238271..000000000
--- a/esy.json
+++ /dev/null
@@ -1,14 +0,0 @@
-{
-  "name": "lwt-esy-test",
-  "source": "./lwt.opam",
-  "override": {
-    "dependencies": {
-      "ocaml": "~4.9.0",
-      "@opam/conf-libev": "*",
-      "@opam/bisect_ppx": "*"
-    },
-    "resolutions": {
-      "@opam/conf-libev": "esy-packages/libev:package.json#0b5eb66"
-    }
-  }
-}