diff --git a/js/common/model/Molecule.js b/js/common/model/Molecule.js
index 533739d3..c3641261 100644
--- a/js/common/model/Molecule.js
+++ b/js/common/model/Molecule.js
@@ -46,7 +46,6 @@ class Molecule extends MoleculeStructure {
    */
   shiftDestination( delta ) {
     this.atoms.forEach( atom => {
-      // TODO: memory: consider alternate mutable form atom.destination.add( delta )
       atom.isSeparatingProperty.value = true;
       atom.destinationProperty.value = atom.destinationProperty.value.plus( delta );
     } );