Quentin 08/10/2024: forget acc routine seq modi_gamma

src/PHYEX/aux/modi_gamma.f90

@@ -9,6 +9,7 @@
 INTERFACE GAMMA
 !
 PURE FUNCTION GAMMA_X0D(PX)  RESULT(PGAMMA)
+!$acc routine seq
 REAL, INTENT(IN)                                  :: PX
 REAL                                              :: PGAMMA
 END FUNCTION GAMMA_X0D