remove BN_ncopy, it was only used in bn_nist.c and wasn't particular

useful anyway

crypto/bn/bn.h

@@ -390,8 +390,6 @@ BIGNUM *BN_new(void);
 void	BN_init(BIGNUM *);
 void	BN_clear_free(BIGNUM *a);
 BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b);
-/* BN_ncopy(): like BN_copy() but copies at most the first n BN_ULONGs */
-BIGNUM *BN_ncopy(BIGNUM *a, const BIGNUM *b, size_t n);
 void	BN_swap(BIGNUM *a, BIGNUM *b);
 BIGNUM *BN_bin2bn(const unsigned char *s,int len,BIGNUM *ret);
 int	BN_bn2bin(const BIGNUM *a, unsigned char *to);

crypto/bn/bn_lib.c

@@ -531,46 +531,6 @@ BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)
 	return(a);
 	}
 
-BIGNUM *BN_ncopy(BIGNUM *a, const BIGNUM *b, size_t n)
-	{
-	int i, min;
-	BN_ULONG *A;
-	const BN_ULONG *B;
-
-	bn_check_top(b);
-	if (a == b)
-		return a;
-
-	min = (b->top < (int)n)? b->top: (int)n;
-	if (!min)
-		{
-		BN_zero(a);
-		return a;
-		}
-	if (bn_wexpand(a, min) == NULL)
-		return NULL;
-
-	A=a->d;
-	B=b->d;
-	for (i=min>>2; i>0; i--, A+=4, B+=4)
-		{
-		BN_ULONG a0,a1,a2,a3;
-		a0=B[0]; a1=B[1]; a2=B[2]; a3=B[3];
-		A[0]=a0; A[1]=a1; A[2]=a2; A[3]=a3;
-		}
-	switch (min&3)
-		{
-		case 3: A[2]=B[2];
-		case 2: A[1]=B[1];
-		case 1: A[0]=B[0];
-		case 0: ;
-		}
-	a->top = min;
-	a->neg = b->neg;
-	bn_correct_top(a);
-	return(a);
-	}
-
 void BN_swap(BIGNUM *a, BIGNUM *b)
 	{
 	int flags_old_a, flags_old_b;