diff --git a/PR-459.patch b/PR-459.patch
deleted file mode 100644
index bf2087e..0000000
--- a/PR-459.patch
+++ /dev/null
@@ -1,39 +0,0 @@
-From 6ad13590aff7d6544443e6646555d949bd316796 Mon Sep 17 00:00:00 2001
-From: Ralf Haferkamp <rhafer@suse.de>
-Date: Fri, 12 Jan 2018 13:48:09 +0100
-Subject: [PATCH] greendns: Treat /etc/hosts entries case-insensitive
-
-Hostname in /etc/hosts are not case-sensitive, this fixes
-HostsResolver() accordingly.
-
-eventlet#458
-
-Co-Authored-By: Thomas Bechtold <tbechtold@suse.com>
----
- eventlet/support/greendns.py | 4 +++-
- 1 file changed, 3 insertions(+), 1 deletion(-)
-
-diff --git a/eventlet/support/greendns.py b/eventlet/support/greendns.py
-index cff0581c..140388ec 100644
---- a/eventlet/support/greendns.py
-+++ b/eventlet/support/greendns.py
-@@ -222,9 +222,10 @@ def _load(self):
-                 ipmap = self._v6
-             else:
-                 continue
--            cname = parts.pop(0)
-+            cname = parts.pop(0).lower()
-             ipmap[cname] = ip
-             for alias in parts:
-+                alias = alias.lower()
-                 ipmap[alias] = ip
-                 self._aliases[alias] = cname
-         self._last_load = time.time()
-@@ -251,6 +252,7 @@ def query(self, qname, rdtype=dns.rdatatype.A, rdclass=dns.rdataclass.IN,
-             qname = dns.name.from_text(qname)
-         else:
-             name = str(qname)
-+        name = name.lower()
-         rrset = dns.rrset.RRset(qname, rdclass, rdtype)
-         rrset.ttl = self._last_load + self.interval - now
-         if rdclass == dns.rdataclass.IN and rdtype == dns.rdatatype.A: