Removing unused toStateObject() functions, see #66

js/photons/model/Photon.ts

@@ -87,15 +87,6 @@ export class QuantumPossibleState {
       );
     }
   } );
-
-  public toStateObject(): QuantumPossibleStateStateObject {
-    return {
-      position: Vector2.Vector2IO.toStateObject( this.position ),
-      direction: Vector2.Vector2IO.toStateObject( this.direction ),
-      probability: this.probability,
-      polarization: this.polarization
-    };
-  }
 }
 
 export default class Photon {
@@ -181,16 +172,6 @@ export default class Photon {
       );
     }
   } );
-
-  private toStateObject(): PhotonStateObject {
-    return {
-      polarizationAngle: this.polarizationAngle,
-      possibleStates: {
-        vertical: this.possibleStates.vertical.toStateObject(),
-        horizontal: this.possibleStates.horizontal.toStateObject()
-      }
-    };
-  }
 }
 
 type TwoStateQuantumPossibleState = {

js/photons/model/PhotonCollection.ts

@@ -13,7 +13,7 @@ import Tandem from '../../../../tandem/js/Tandem.js';
 import IOType from '../../../../tandem/js/types/IOType.js';
 import ReferenceArrayIO from '../../../../tandem/js/types/ReferenceArrayIO.js';
 import quantumMeasurement from '../../quantumMeasurement.js';
-import Photon, { PhotonStateObject } from './Photon.js';
+import Photon from './Photon.js';
 
 export class PhotonCollection extends PhetioObject {
 
@@ -56,16 +56,6 @@ export class PhotonCollection extends PhetioObject {
       photons: ReferenceArrayIO( Photon.PhotonIO )
     }
   } );
-
-  private toStateObject(): PhotonCollectionStateObject {
-    return {
-      photons: this.photons.map( photon => Photon.PhotonIO.toStateObject( photon ) )
-    };
-  }
 }
 
-type PhotonCollectionStateObject = {
-  photons: PhotonStateObject[];
-};
-
 quantumMeasurement.register( 'PhotonCollection', PhotonCollection );