remove comments

src/kiri/print.js

@@ -349,11 +349,9 @@
                     });
                     break;
                 case 'G10':
-                    console.log('retract');
                     seq.last().retract = true;
                     break;
                 case 'G11':
-                    console.log('unretract');
                     break;
                 case 'G0':
                     G0G1(true, line);