Last build fixes

Author: SimonDarksideJ

Assets/MixedRealityToolkit/_Core/Managers/MixedRealityManager.cs

@@ -924,6 +924,8 @@ private void AddManagersForTheCurrentPlatform()
             }
         }
 
+#if UNITY_EDITOR
+
         private void AddManagersForTheCurrentPlatformEditor()
         {
             switch (UnityEditor.EditorUserBuildSettings.activeBuildTarget)
@@ -947,6 +949,8 @@ private void AddManagersForTheCurrentPlatformEditor()
             }
         }
 
+#endif
+
         #endregion Platform Selectors
     }
 }