cli/command: remove deprecated EncodeAuthToBase64

This function was deprecated in b87ed34,
which is part of the v24.0 release, so we can remove it from master.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah

cli/command/registry.go

@@ -19,13 +19,6 @@ import (
 	"github.com/pkg/errors"
 )
 
-// EncodeAuthToBase64 serializes the auth configuration as JSON base64 payload.
-//
-// Deprecated: use [registrytypes.EncodeAuthConfig] instead.
-func EncodeAuthToBase64(authConfig registrytypes.AuthConfig) (string, error) {
-	return registrytypes.EncodeAuthConfig(authConfig)
-}
-
 // RegistryAuthenticationPrivilegedFunc returns a RequestPrivilegeFunc from the specified registry index info
 // for the given command.
 func RegistryAuthenticationPrivilegedFunc(cli Cli, index *registrytypes.IndexInfo, cmdName string) types.RequestPrivilegeFunc {