net-libs/libslirp: remove unused patch(es)

Closes: https://github.com/gentoo/gentoo/pull/21628
Package-Manager: Portage-3.0.20, Repoman-3.0.3
Signed-off-by: Michael Mair-Keimberger <mmk@levelnine.at>
Signed-off-by: Conrad Kostecki <conikost@gentoo.org>

net-libs/libslirp/files/libslirp-4.3.1-bug-756910-check-pkt_len.patch

@@ -1,48 +0,0 @@
-From: Prasad J Pandit <pjp@fedoraproject.org>
-Date: Thu, 26 Nov 2020 13:57:06 +0000
-Subject: [PATCH] slirp: check pkt_len before reading protocol header
-
-While processing ARP/NCSI packets in 'arp_input' or 'ncsi_input'
-routines, ensure that pkt_len is large enough to accommodate the
-respective protocol headers, lest it should do an OOB access.
-Add check to avoid it.
-
-Reported-by: Qiuhao Li @outlook.com;
-Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
----
- src/ncsi.c  | 4 ++++
- src/slirp.c | 4 ++++
- 2 files changed, 8 insertions(+)
-
-diff --git a/src/ncsi.c b/src/ncsi.c
-index 3c1dfef..75dcc08 100644
---- a/src/ncsi.c
-+++ b/src/ncsi.c
-@@ -148,6 +148,10 @@ void ncsi_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
-     uint32_t checksum;
-     uint32_t *pchecksum;
- 
-+    if (pkt_len < ETH_HLEN + sizeof(struct ncsi_pkt_hdr)) {
-+        return; /* packet too short */
-+    }
-+
-     memset(ncsi_reply, 0, sizeof(ncsi_reply));
- 
-     memset(reh->h_dest, 0xff, ETH_ALEN);
-diff --git a/src/slirp.c b/src/slirp.c
-index 9bead0c..abb6f9a 100644
---- a/src/slirp.c
-+++ b/src/slirp.c
-@@ -860,6 +860,10 @@ static void arp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
-         return;
-     }
- 
-+    if (pkt_len < ETH_HLEN + sizeof(struct slirp_arphdr)) {
-+        return; /* packet too short */
-+    }
-+
-     ar_op = ntohs(ah->ar_op);
-     switch (ar_op) {
-     case ARPOP_REQUEST:
--- 
-2.28.0