keep removed 5.7 changes inside SGXRTracker implementation file conditionally, in order to reduce maintenance burden

Source/SenseGloveTracking/Private/SGTracking/SGXRTracker.cpp

@@ -1013,6 +1013,8 @@ FTransform FSGXRTracker::FImpl::GetMeshFingerStartBoneRefTransform(
     return Transform;
 }
 
+#if ENGINE_MAJOR_VERSION >= 5 && ENGINE_MINOR_VERSION < 7
+
 bool FSGXRTracker::GetMotionControllerData(
     UObject* WorldContextObject,
     const EControllerHand Hand,
@@ -1238,6 +1240,8 @@ bool FSGXRTracker::GetMotionControllerData(
     return OutMotionControllerData.bValid;
 }
 
+#endif  /* ENGINE_MAJOR_VERSION >= 5 && ENGINE_MINOR_VERSION < 7 */
+
 #if ENGINE_MAJOR_VERSION >= 5 && ENGINE_MINOR_VERSION >= 5
 
 bool FSGXRTracker::GetMotionControllerState(