[CRYPTO] Remove unused iv field from context structure

The iv field in des_ctx/des3_ede_ctx/serpent_ctx has never been used.
This was noticed by Dag Arne Osvik.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

crypto/des.c

@@ -38,12 +38,10 @@
 #define ROR(d,c,o)	((d) = (d) >> (c) | (d) << (o))
 
 struct des_ctx {
-	u8 iv[DES_BLOCK_SIZE];
 	u32 expkey[DES_EXPKEY_WORDS];
 };
 
 struct des3_ede_ctx {
-	u8 iv[DES_BLOCK_SIZE];
 	u32 expkey[DES3_EDE_EXPKEY_WORDS];
 };
 

crypto/serpent.c

@@ -210,7 +210,6 @@
 	x4 ^= x2;
 
 struct serpent_ctx {
-	u8 iv[SERPENT_BLOCK_SIZE];
 	u32 expkey[SERPENT_EXPKEY_WORDS];
 };