disabled armclang hotfix cause armclang 20.0 performance gets a little

Grid/simd/Grid_vector_types.h

@@ -118,7 +118,7 @@ accelerator_inline Grid_half sfw_float_to_half(float ff) {
 #ifdef GEN
   #if defined(A64FX) // breakout A64FX SVE ACLE here
     //#pragma message("building for A64FX / SVE ACLE")
-    #define ARMCLANGHOTFIX
+    //#define ARMCLANGHOTFIX
     #include "Grid_a64fx-2.h"
   #else
     #include "Grid_generic.h"