diff --git a/plugin/docker.go b/plugin/docker.go
index 7afb946..cd44a2f 100644
--- a/plugin/docker.go
+++ b/plugin/docker.go
@@ -1,7 +1,6 @@
 package plugin
 
 import (
-	"errors"
 	"fmt"
 	"os"
 	"strings"
@@ -11,8 +10,6 @@ import (
 	"golang.org/x/sys/execabs"
 )
 
-var errInvalidSecret = errors.New("invalid secret")
-
 // helper function to create the docker login command.
 func commandLogin(login Login) *execabs.Cmd {
 	if login.Email != "" {