db/update/Walk: move PurgeDanglingFromPlaylists() to Playlist.cxx

src/db/update/Playlist.cxx

@@ -126,3 +126,25 @@ UpdateWalk::UpdatePlaylistFile(Directory &directory,
 
 	return true;
 }
+
+void
+UpdateWalk::PurgeDanglingFromPlaylists(Directory &directory) noexcept
+{
+	/* recurse */
+	for (Directory &child : directory.children)
+		PurgeDanglingFromPlaylists(child);
+
+	if (!directory.IsPlaylist())
+		/* this check is only for virtual directories
+		   representing a playlist file */
+		return;
+
+	directory.ForEachSongSafe([&](Song &song){
+		if (!song.target.empty() &&
+		    !PathTraitsUTF8::IsAbsoluteOrHasScheme(song.target.c_str()) &&
+		    !directory.TargetExists(song.target)) {
+			editor.DeleteSong(directory, &song);
+			modified = true;
+		}
+	});
+}

src/db/update/Walk.cxx

@@ -132,28 +132,6 @@ UpdateWalk::PurgeDeletedFromDirectory(Directory &directory) noexcept
 	}
 }
 
-void
-UpdateWalk::PurgeDanglingFromPlaylists(Directory &directory) noexcept
-{
-	/* recurse */
-	for (Directory &child : directory.children)
-		PurgeDanglingFromPlaylists(child);
-
-	if (!directory.IsPlaylist())
-		/* this check is only for virtual directories
-		   representing a playlist file */
-		return;
-
-	directory.ForEachSongSafe([&](Song &song){
-		if (!song.target.empty() &&
-		    !PathTraitsUTF8::IsAbsoluteOrHasScheme(song.target.c_str()) &&
-		    !directory.TargetExists(song.target)) {
-			editor.DeleteSong(directory, &song);
-			modified = true;
-		}
-	});
-}
-
 #ifndef _WIN32
 static bool
 update_directory_stat(Storage &storage, Directory &directory) noexcept