xrootd: 5.8.4 -> 5.9.1 (#468783)

pkgs/by-name/xr/xrootd/package.nix

@@ -3,7 +3,6 @@
   stdenv,
   callPackage,
   fetchFromGitHub,
-  fetchpatch2,
   davix,
   cmake,
   gtest,
@@ -31,25 +30,16 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "xrootd";
-  version = "5.8.4";
+  version = "5.9.1";
 
   src = fetchFromGitHub {
     owner = "xrootd";
     repo = "xrootd";
     tag = "v${finalAttrs.version}";
     fetchSubmodules = true;
-    hash = "sha256-r0wXAlm+K6TE6189QyZL/k3q5IKlouSBKWzWXz1Tws4=";
+    hash = "sha256-XClMtQfCGWpLtILGQyYCsKMcOlhLHC5i7UabzXH/imc=";
   };
 
-  patches = [
-    # Downgrade -Wnull-dereference from error to warning
-    # Should be removed in the release after next
-    (fetchpatch2 {
-      url = "https://github.com/xrootd/xrootd/commit/135b33b9631891219889fcaad449a4efb5e77d95.patch";
-      hash = "sha256-t6Cy2XWp3B+sbMBxLhsh3WjQlXg4Tb7fF+rGGgYollU=";
-    })
-  ];
-
   postPatch = ''
     patchShebangs genversion.sh
     substituteInPlace cmake/XRootDConfig.cmake.in \