updates vm_impls and core.h to work with new vm_base

src/iss/arch/tgc5c.h

@@ -189,7 +189,6 @@ struct tgc5c: public arch_if {
 
     uint8_t* get_regs_base_ptr() override;
 
-    inline uint64_t get_icount() { return reg.icount; }
 
     inline bool should_stop() { return interrupt_sim; }
 
@@ -199,7 +198,6 @@ struct tgc5c: public arch_if {
 
     virtual iss::sync_type needed_sync() const { return iss::NO_SYNC; }
 
-    inline uint32_t get_last_branch() { return reg.last_branch; }
 
 
 #pragma pack(push, 1)