python310Packages.authheaders: remove backport ipaddress (#175415)

Co-authored-by: Jonathan Ringer <jonringer@users.noreply.github.com>

pkgs/development/python-modules/authheaders/default.nix

@@ -1,5 +1,5 @@
-{ buildPythonPackage, fetchPypi, isPy27, lib
-, authres, dnspython, dkimpy, ipaddress, publicsuffix2
+{ buildPythonPackage, fetchPypi, lib
+, authres, dnspython, dkimpy, publicsuffix2
 }:
 
 buildPythonPackage rec {
@@ -11,12 +11,12 @@ buildPythonPackage rec {
     sha256 = "sha256-90rOvu+CbHtammrMDZpPx7rIboIT2X/jL1GtfjpmuOk=";
   };
 
-  propagatedBuildInputs = [ authres dnspython dkimpy publicsuffix2 ]
-                          ++ lib.optional isPy27 ipaddress;
+  propagatedBuildInputs = [ authres dnspython dkimpy publicsuffix2 ];
 
-  meta = {
+  meta = with lib; {
     description = "Python library for the generation of email authentication headers";
     homepage = "https://github.com/ValiMail/authentication-headers";
-    license = lib.licenses.mit;
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
   };
 }