chore: remove unused code left over from previous iterations

go.mod

@@ -22,7 +22,6 @@ require (
 	github.com/spf13/cobra v1.7.0
 	github.com/spf13/pflag v1.0.5
 	github.com/spf13/viper v1.16.0
-	golang.org/x/crypto v0.17.0
 	golang.org/x/exp v0.0.0-20231127185646-65229373498e
 	google.golang.org/protobuf v1.32.0
 	gopkg.in/yaml.v2 v2.4.0
@@ -259,6 +258,7 @@ require (
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.26.0 // indirect
 	go4.org v0.0.0-20230225012048-214862532bf5 // indirect
+	golang.org/x/crypto v0.17.0 // indirect
 	golang.org/x/mod v0.14.0 // indirect
 	golang.org/x/net v0.19.0 // indirect
 	golang.org/x/oauth2 v0.12.0 // indirect

pkg/crypto/aes.go

@@ -6,10 +6,7 @@ import (
 	"crypto/aes"
 	"crypto/cipher"
 	"crypto/rand"
-	"crypto/sha256"
 	"io"
-
-	"golang.org/x/crypto/pbkdf2"
 )
 
 // Helper functions related to AES-GCM encryption, used by the crypto package itself.
@@ -65,11 +62,6 @@ func generateNonce() ([]byte, error) {
 	return nonce, nil
 }
 
-// could drive a nonce or a symmetric key, both are []byte
-func deriveAesKey(password []byte, salt []byte) []byte {
-	return pbkdf2.Key(password, salt, pbkdf2_ITER_COUNT, aes_KEY_SIZE, sha256.New)
-}
-
 func createAESGCMMode(key []byte) (cipher.AEAD, error) {
 	// Create a cipher block from the key
 	block, err := aes.NewCipher([]byte(key))