Remove #ifdef's for IRIX_CC_BUG

Reviewed-by: NAndy Polyakov <appro@openssl.org>

crypto/bn/bn_add.c

@@ -171,9 +171,6 @@ int BN_usub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)
 	register BN_ULONG t1,t2,*rp;
 	register const BN_ULONG *ap,*bp;
 	int i,carry;
-#if defined(IRIX_CC_BUG) && !defined(LINT)
-	int dummy;
-#endif
 
 	bn_check_top(a);
 	bn_check_top(b);
@@ -210,9 +207,6 @@ int BN_usub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b)
 			carry=(t1 < t2);
 			t1=(t1-t2)&BN_MASK2;
 			}
-#if defined(IRIX_CC_BUG) && !defined(LINT)
-		dummy=t1;
-#endif
 		*(rp++)=t1&BN_MASK2;
 		}
 #else

e_os.h

@@ -657,13 +657,6 @@ extern char *sys_errlist[]; extern int sys_nerr;
 
 #define DG_GCC_BUG	/* gcc < 2.6.3 on DGUX */
 
-#ifdef sgi
-#define IRIX_CC_BUG	/* all version of IRIX I've tested (4.* 5.*) */
-#endif
-#ifdef OPENSSL_SYS_SNI
-#define IRIX_CC_BUG	/* CDS++ up to V2.0Bsomething suffered from the same bug.*/
-#endif
-
 #if defined(OPENSSL_SYS_WINDOWS)
 #  define strcasecmp _stricmp
 #  define strncasecmp _strnicmp