diff --git a/toJSON-legacy/go.mod b/toJSON-legacy/go.mod
deleted file mode 100644
index 77fd623..0000000
--- a/toJSON-legacy/go.mod
+++ /dev/null
@@ -1,8 +0,0 @@
-module toJSON
-
-go 1.18
-
-require (
-	github.com/BurntSushi/toml v1.2.0
-	gopkg.in/yaml.v3 v3.0.1
-)
diff --git a/toJSON-legacy/go.sum b/toJSON-legacy/go.sum
deleted file mode 100644
index 9eb3253..0000000
--- a/toJSON-legacy/go.sum
+++ /dev/null
@@ -1,6 +0,0 @@
-github.com/BurntSushi/toml v1.2.0 h1:Rt8g24XnyGTyglgET/PRUNlrUeu9F5L+7FilkXfZgs0=
-github.com/BurntSushi/toml v1.2.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/toJSON-legacy/main.go b/toJSON-legacy/main.go
deleted file mode 100644
index cb3d6ff..0000000
--- a/toJSON-legacy/main.go
+++ /dev/null
@@ -1,40 +0,0 @@
-package main
-
-import (
-    "encoding/json"
-    "fmt"
-    "github.com/BurntSushi/toml"
-    "gopkg.in/yaml.v3"
-    "os"
-)
-
-func parser(raw []byte) (interface{}, interface{}) {
-    var object interface{}
-    if err := json.Unmarshal(raw, &object); err == nil { // try json
-        return object, nil // json format
-    }
-    if err := toml.Unmarshal(raw, &object); err == nil { // try toml
-        return object, nil // toml format
-    }
-    if err := yaml.Unmarshal(raw, &object); err == nil { // try yaml
-        return object, nil // yaml format
-    }
-    return nil, nil // parser error
-}
-
-func main() {
-    if len(os.Args) < 2 { // without argument
-        fmt.Printf("usage: toJSON [file]\n")
-        os.Exit(0)
-    }
-    raw, err := os.ReadFile(os.Args[1])
-    if err != nil {
-        os.Exit(2) // file open failed
-    }
-    if object, err := parser(raw); err == nil {
-        ret, _ := json.Marshal(object)
-        fmt.Println(string(ret))
-        os.Exit(0)
-    }
-    os.Exit(1) // unmarshal failed
-}