adapt to extended instrumentation interface

gen_input/templates/CORENAME.h.gtl

@@ -169,7 +169,6 @@ struct ${coreDef.name.toLowerCase()}: public arch_if {
         }}%>
         uint32_t trap_state = 0, pending_trap = 0;
         uint64_t icount = 0;
-        uint64_t cycle = 0;
         uint64_t instret = 0;
         uint32_t last_branch;
     } reg;