Removed error message when vectorisation is turned on using Gadget 2 SPH scheme.

examples/main.c

@@ -269,12 +269,6 @@ int main(int argc, char *argv[]) {
 /* Temporary abort to handle absence of vectorized functions */
 #ifdef WITH_VECTORIZATION
 
-#ifdef GADGET2_SPH
-  error(
-      "Vectorized version of Gadget SPH routines not implemented yet. "
-      "Reconfigure with --disable-vec and recompile or use DEFAULT_SPH.");
-#endif
-
 #ifdef MINIMAL_SPH
   error(
       "Vectorized version of Minimal SPH routines not implemented yet. "