re2c: 1.3 -> 2.1.1

Release notes:
https://re2c.org/releases/release_notes.html#release-2-1-1

pkgs/development/tools/parsing/re2c/default.nix

@@ -1,48 +1,16 @@
-{ lib, stdenv, fetchFromGitHub, fetchpatch, autoreconfHook }:
+{ lib, stdenv, fetchFromGitHub, autoreconfHook }:
 
 stdenv.mkDerivation rec {
   pname = "re2c";
-  version = "1.3";
+  version = "2.1.1";
 
   src = fetchFromGitHub {
     owner  = "skvadrik";
     repo   = "re2c";
     rev    = version;
-    sha256 = "0aqlf2h6i2m3dq11dkq89p4w4c9kp4x66s5rhp84gmpz5xqv1x5h";
+    sha256 = "06nvk5sf4vrc2bvpj4vi2xwy3ggv548sn530drz5fi67nhzgga26";
   };
 
-  patches = [
-    (fetchpatch {
-      name = "CVE-2018-21232-part1.patch";
-      url = "https://github.com/skvadrik/re2c/commit/fd634998f813340768c333cdad638498602856e5.patch";
-      sha256 = "1blyg5lyhqd4ymisih65xl0g36ig71ijia4skkkd59rdvj78aiw6";
-    })
-
-    (fetchpatch {
-      name = "CVE-2018-21232-part2.patch";
-      url = "https://github.com/skvadrik/re2c/commit/7b5643476bd99c994c4f51b8143f942982d85521.patch";
-      sha256 = "0rhmgqrinpk49r9x75ygrs14lz72aw5ad5kr6qp9bdyl8gs082qp";
-    })
-
-    (fetchpatch {
-      name = "CVE-2018-21232-part3.patch";
-      url = "https://github.com/skvadrik/re2c/commit/4d9c809355b574f2a58eac119f5e076c48e4d1e2.patch";
-      sha256 = "0k86wg9icw1gkqpf7rq2w6xsq4caxw3rc0zfxf39liwa35027rai";
-    })
-
-    (fetchpatch {
-      name = "CVE-2018-21232-part4.patch";
-      url = "https://github.com/skvadrik/re2c/commit/89be91f3df00657261870adbc590209fdb2bc405.patch";
-      sha256 = "1aygy9va7jwby93chlskwg7z90fn07x5hym0gziwlkx8k900p3a3";
-    })
-
-    (fetchpatch {
-      name = "CVE-2020-11958.patch";
-      url = "https://github.com/skvadrik/re2c/commit/c4603ba5ce229db83a2a4fb93e6d4b4e3ec3776a.patch";
-      sha256 = "1d95ahxk92g7k87sda9gxgmr3blyfzwd2y7h9jxj8zkd74knd9zh";
-    })
-  ];
-
   nativeBuildInputs = [ autoreconfHook ];
 
   doCheck = true;
@@ -54,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = with lib; {
     description = "Tool for writing very fast and very flexible scanners";
-    homepage    = "http://re2c.org";
+    homepage    = "https://re2c.org";
     license     = licenses.publicDomain;
     platforms   = platforms.all;
     maintainers = with maintainers; [ thoughtpolice ];