Remove some more vectorize hints in view of gcc enabling it in O2

Remove some more vectorize hints in view of gcc enabling it in O2

gcc13 in O2 seems to vectorize the main cases we were after. Note that we use also explicit vec via Eigen or vec.h

PS : [https://godbolt.org/z/jr1bMrvfe]

Tracking/TrkExtrapolation/TrkExRungeKuttaPropagator/src/RungeKuttaPropagator.cxx

@@ -27,10 +27,6 @@
 #include "TrkPatternParameters/PatternTrackParameters.h"
 
 #include "CxxUtils/restrict.h"
-/// enables -ftree-vectorize in gcc
-#include "CxxUtils/vectorize.h"
-ATH_ENABLE_VECTORIZATION;
-
 
 namespace {
 /*