delete guess expected size feature

it it doing some really bad guesses for opus files

transcode/transcoder_none.go

@@ -2,6 +2,7 @@ package transcode
 
 import (
 	"context"
+	"fmt"
 	"io"
 	"os"
 )
@@ -14,6 +15,14 @@ func NewNoneTranscoder() *NoneTranscoder {
 	return &NoneTranscoder{}
 }
 
-func (*NoneTranscoder) Transcode(ctx context.Context, _ Profile, in string) (io.ReadCloser, error) {
-	return os.Open(in)
+func (*NoneTranscoder) Transcode(ctx context.Context, _ Profile, in string, out io.Writer) error {
+	file, err := os.Open(in)
+	if err != nil {
+		return fmt.Errorf("open file: %w", err)
+	}
+	defer file.Close()
+	if _, err := io.Copy(out, file); err != nil {
+		return fmt.Errorf("copy file: %w", err)
+	}
+	return nil
 }