refactor(Simulator): remove duplicated code
refactor(Simulator): remove duplicated code

The Simulator Headset SDK does the same for both the headset getter
methods. This change removes one of the implementations and calls the
other one instead to remove the duplicated code.

mattboy64/SteamVR_Unity_Toolkit,TMaloteaux/SteamVR_Unity_Toolkit,adamjweaver/VRTK,gomez-addams/SteamVR_Unity_Toolkit,thestonefox/VRTK,gpvigano/VRTK,thestonefox/SteamVR_Unity_Toolkit,red-horizon/VRTK,Fulby/VRTK,virror/VRTK,Innoactive/IA-unity-VR-toolkit-VRTK,gpvigano/SteamVR_Unity_Toolkit