diff --git a/src/cmd/go/internal/modcmd/mod.go b/src/cmd/go/internal/modcmd/mod.go
index 1750522158..d72d0cacd6 100644
--- a/src/cmd/go/internal/modcmd/mod.go
+++ b/src/cmd/go/internal/modcmd/mod.go
@@ -7,7 +7,6 @@ package modcmd
 
 import (
 	"cmd/go/internal/base"
-	"cmd/go/internal/cfg"
 )
 
 var CmdMod = &base.Command{
@@ -32,7 +31,3 @@ See 'go help modules' for an overview of module functionality.
 		cmdWhy,
 	},
 }
-
-func addModFlags(cmd *base.Command) {
-	cmd.Flag.StringVar(&cfg.ModFile, "modfile", "", "")
-}