Remove some IDA garbage

defs.h

@@ -119,14 +119,10 @@
 #define _LOBYTE(x)  BYTEn(x,LOW_IND(x,BYTE))
 #define _LOWORD(x)  WORDn(x,LOW_IND(x,WORD))
 #define _HIBYTE(x)  BYTEn(x,HIGH_IND(x,BYTE))
-#define _HIWORD(x)  WORDn(x,HIGH_IND(x,WORD))
 #define BYTE1(x)   BYTEn(x,  1)         // byte 1 (counting from 0)
 #define BYTE2(x)   BYTEn(x,  2)
 
-// now signed macros (the same but with sign extension)
-#define SBYTEn(x, n)   (*((char*)&(x)+n))
-
-#define SLOBYTE(x)  SBYTEn(x,LOW_IND(x,char))
+#define SLOBYTE(x)   (*((char*)&(x)+LOW_IND(x,char)))
 
 // Helper functions to represent some assembly instructions.
 
@@ -141,14 +137,6 @@ __inline void *qmemcpy(void *dst, const void *src, size_t cnt)
 	return dst;
 }
 
-// rotate right
-__inline WORD __ROR2__(WORD value, DWORD count)
-{
-	count %= 16;
-
-	return value >> count | value << (16 - count);
-}
-
 #endif /* IDA_GARBAGE */
 
 // Typedef for the function pointer