refactor: remove logging in algorithms

algo/tm/tm.go

@@ -3,6 +3,7 @@ package tm
 import (
 	"bytes"
 	"errors"
+
 	"github.com/unlock-music/cli/algo/common"
 )
 
@@ -16,10 +17,6 @@ type Decoder struct {
 	audioExt    string
 }
 
-func (d *Decoder) GetCoverImage() []byte {
-	return nil
-}
-
 func (d *Decoder) GetAudioData() []byte {
 	return d.audio
 }