Remove a pointless "#ifndef" from bf_enc.c

Reviewed-by: NAndy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2778)

crypto/bf/bf_enc.c

@@ -60,8 +60,6 @@ void BF_encrypt(BF_LONG *data, const BF_KEY *key)
     data[0] = r & 0xffffffffU;
 }
 
-#ifndef BF_DEFAULT_OPTIONS
-
 void BF_decrypt(BF_LONG *data, const BF_KEY *key)
 {
     register BF_LONG l, r;
@@ -175,5 +173,3 @@ void BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
     tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0;
     tin[0] = tin[1] = 0;
 }
-
-#endif