removed recently added photonAbsorbedEmitter, since it isn't actually…

… needed, see #216

js/photon-absorption/model/Molecule.js

@@ -142,9 +142,6 @@ define( require => {
     // @public, set by PhotonAbsorptionModel
     this.photonGroupTandem = null;
 
-    // @public (read-only) {Emitter} - emitter for when a photon is absorbed
-    this.photonAbsorbedEmitter = new Emitter( { parameters: [ { valueType: Photon } ] } );
-
     // @public (read-only) {Emitter} - emitter for when a photon is emitted
     this.photonEmittedEmitter = new Emitter( { parameters: [ { valueType: Photon } ] } );
 
@@ -432,9 +429,9 @@ define( require => {
             absorbPhoton = true;
             this.activePhotonAbsorptionStrategy = candidateAbsorptionStrategy;
             this.activePhotonAbsorptionStrategy.queryAndAbsorbPhoton( photon );
-            this.photonAbsorbedEmitter.emit( photon );
           }
           else {
+
             // We have the decision logic once for whether a photon should be absorbed, so it is not queried a second
             // time.
             this.markPhotonForPassThrough( photon );