diff --git a/http.go b/http.go
deleted file mode 100644
index a45134d42c07d2e7bc36d01e9a3ab0a55ac1ed5c..0000000000000000000000000000000000000000
--- a/http.go
+++ /dev/null
@@ -1,21 +0,0 @@
-package main
-
-import (
-	"net/http"
-	"strconv"
-)
-
-const (
-	HttpOK = "HTTP/1.1 200 OK\r\n"
-	MethodRDGIN  = "RDG_IN_DATA"
-	MethodRDGOUT = "RDG_OUT_DATA"
-)
-
-// httpError is like the http.Error with WebSocket context exception.
-func httpError(w http.ResponseWriter, body string, code int) {
-	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
-	w.Header().Set("Content-Length", strconv.Itoa(len(body)))
-	w.WriteHeader(code)
-	w.Write([]byte(body))
-}
-