Removed duplicate definition of PKCS7_type_is_encrypted

Patch supplied by Matthieu Patou <mat@matws.net>, and modified to also
remove duplicate definition of PKCS7_type_is_digest.

PR#3551
Reviewed-by: NRich Salz <rsalz@openssl.org>

crypto/pkcs7/pkcs7.h

@@ -233,10 +233,6 @@ DECLARE_PKCS12_STACK_OF(PKCS7)
 		(OBJ_obj2nid((a)->type) == NID_pkcs7_signedAndEnveloped)
 #define PKCS7_type_is_data(a)   (OBJ_obj2nid((a)->type) == NID_pkcs7_data)
 #define PKCS7_type_is_digest(a)   (OBJ_obj2nid((a)->type) == NID_pkcs7_digest)
-#define PKCS7_type_is_encrypted(a) \
-		(OBJ_obj2nid((a)->type) == NID_pkcs7_encrypted)
-
-#define PKCS7_type_is_digest(a)   (OBJ_obj2nid((a)->type) == NID_pkcs7_digest)
 
 #define PKCS7_set_detached(p,v) \
 		PKCS7_ctrl(p,PKCS7_OP_SET_DETACHED_SIGNATURE,v,NULL)