fixup unused functions/vars

pkg/auth/token/handler_test.go

@@ -2,7 +2,6 @@ package token
 
 import (
 	"context"
-	"crypto/rsa"
 	"crypto/tls"
 	"database/sql"
 	"encoding/base64"
@@ -22,7 +21,6 @@ import (
 // Shared test key to avoid generating a new RSA key for each test
 // Generating a 2048-bit RSA key takes ~0.15s, so reusing one key saves ~4.5s for 32 tests
 var (
-	sharedTestKey     *rsa.PrivateKey
 	sharedTestKeyPath string
 	sharedTestKeyOnce sync.Once
 	sharedTestKeyDir  string