Remove Hit class declaration from TimeFrame.h

Removed the declaration of the Hit class from TimeFrame.h.

Author: njacazio

Detectors/Upgrades/ALICE3/TRK/reconstruction/include/TRKReconstruction/TimeFrame.h

@@ -33,7 +33,6 @@ namespace o2
 {
 namespace trk
 {
-class Hit;
 class GeometryTGeo;
 
 /// TRK TimeFrame class that extends ITS TimeFrame functionality