haskellPackages.hnix: drop obsolete patch

pkgs/development/haskell-modules/configuration-common.nix

@@ -182,7 +182,7 @@ self: super: {
   digit = doJailbreak super.digit;
 
   # hnix.patch needed until the next release is bumped
-  hnix = appendPatch ./patches/hnix.patch (generateOptparseApplicativeCompletion "hnix"
+  hnix = generateOptparseApplicativeCompletion "hnix"
     (overrideCabal (drv: {
       # 2020-06-05: HACK: does not pass own build suite - `dontCheck`
       doCheck = false;
@@ -190,7 +190,7 @@ self: super: {
       # needs newer version of relude and semialign than stackage has
       relude = self.relude_1_0_0_1;
       semialign = self.semialign_1_2_0_1;
-    })));
+    }));
 
   # Fails for non-obvious reasons while attempting to use doctest.
   focuslist = dontCheck super.focuslist;

pkgs/development/haskell-modules/patches/hnix.patch

@@ -1,24 +0,0 @@
-From 06b12ab8a733d4de2a39060ba29c06e4ec1c1187 Mon Sep 17 00:00:00 2001
-From: Anton Latukha <anton.latukha@gmail.com>
-Date: Sun, 16 Jan 2022 18:16:50 +0200
-Subject: [PATCH] fix aeson <2 support
-
----
- src/Nix/Json.hs | 2 ++
- 1 file changed, 2 insertions(+)
-
-diff --git a/src/Nix/Json.hs b/src/Nix/Json.hs
-index 3fe05269..329899e4 100644
---- a/src/Nix/Json.hs
-+++ b/src/Nix/Json.hs
-@@ -9,6 +9,8 @@ import qualified Data.Text.Lazy.Encoding       as TL
- #if MIN_VERSION_aeson(2,0,0)
- import qualified Data.Aeson.Key                as AKM
- import qualified Data.Aeson.KeyMap             as AKM
-+#else
-+import           Nix.Expr.Types
- #endif
- import qualified Data.Vector                   as V
- import           Nix.Atoms
--- 
-2.34.1