4444 remove unused cpuid-related globals

*** 653,665 ****
  extern uint_t x86_type;
  extern uint_t x86_vendor;
  extern uint_t x86_clflush_size;
  
  extern uint_t pentiumpro_bug4046376;
- extern uint_t pentiumpro_bug4064495;
- 
- extern uint_t enable486;
  
  extern const char CyrixInstead[];
  
  #endif
  
--- 653,662 ----