Rewrote the recompiler interrupt checking in assembly (and removed it for the new dynamic compiler because the requires uops are not present), brings performance back up, and also did a number of CPU-related clean-ups (mostly removal of dead variables and associated code).

src/codegen/codegen_accumulate.h

@@ -1,7 +1,6 @@
 enum
 {
-        ACCREG_ins    = 0,
-        ACCREG_cycles = 1,
+        ACCREG_cycles = 0,
         
         ACCREG_COUNT
 };