PGP 5 is rather ancient history, don't bother

I dont recall ever seeing a package with a PGP5 signature in it, certainly
not in last 15 years... Not trying to verify long since extinct species
of signatures should not affect anybodys life.

lib/rpmvs.c

@@ -27,7 +27,6 @@ static const struct vfytag_s rpmvfytags[] = {
     {	RPMSIGTAG_PGP,			RPM_BIN_TYPE,		0,	0, },
     {	RPMSIGTAG_MD5,			RPM_BIN_TYPE,		0,	16, },
     {	RPMSIGTAG_GPG,			RPM_BIN_TYPE,		0,	0, },
-    { 	RPMSIGTAG_PGP5,			RPM_BIN_TYPE,		0,	0, },
     {	RPMSIGTAG_PAYLOADSIZE,		RPM_INT32_TYPE,		1,	4, },
     {	RPMSIGTAG_RESERVEDSPACE,	RPM_BIN_TYPE,		0,	0, },
     {	RPMTAG_DSAHEADER,		RPM_BIN_TYPE,		0,	0, },
@@ -59,9 +58,6 @@ static const struct vfyinfo_s rpmvfyitems[] = {
     {	RPMSIGTAG_GPG,			1,
 	{ RPMSIG_SIGNATURE_TYPE,		RPMVSF_NODSA,
 	(RPMSIG_HEADER|RPMSIG_PAYLOAD), 0, }, },
-    { 	RPMSIGTAG_PGP5,			1,
-	{ RPMSIG_SIGNATURE_TYPE,		RPMVSF_NORSA,
-	(RPMSIG_HEADER|RPMSIG_PAYLOAD), 0, }, },
     {	RPMSIGTAG_PAYLOADSIZE,		1,
 	{ RPMSIG_OTHER_TYPE,		0,
 	(RPMSIG_PAYLOAD),		0, }, },