nixpkgs: cleanup patching implementation

pkgs/additional/nixpkgs/default.nix

@@ -41,16 +41,11 @@ let
   };
   unpatchedNixpkgs = import unpatchedSrc { inherit localSystem; };
 
-  patchesFor = unpatchedNixpkgs.callPackage ./list.nix { };
-
   patchedSrc = unpatchedNixpkgs.applyPatches {
     name = "nixpkgs-patched-uninsane";
     # version = ...
     src = unpatchedSrc;
-    patches = patchesFor {
-      inherit variant;
-      date = unpatchedSrc.lastModifiedDate;
-    };
+    patches = unpatchedNixpkgs.callPackage ./list.nix { };
     # skip applied patches
     prePatch = ''
       realpatch=$(command -v patch)

pkgs/additional/nixpkgs/list.nix

@@ -1,5 +1,4 @@
 { fetchpatch2, fetchurl, lib }:
-{ variant, date }:
 let
   fetchpatch' = {
     saneCommit ? null,
@@ -8,7 +7,6 @@ let
     hash ? null,
     title ? null,
     revert ? false,
-    merged ? {},
   }:
     let
       url = if prUrl != null then
@@ -19,21 +17,13 @@ let
       else
         "https://github.com/NixOS/nixpkgs/commit/${nixpkgsCommit}.patch"
       ;
-      isMerged = merged ? "${variant}" && lib.versionAtLeast date merged."${variant}";
-    in if !isMerged then fetchpatch2 (
+    in fetchpatch2 (
       { inherit revert url; }
       // (if hash != null then { inherit hash; } else {})
       // (if title != null then { name = title; } else {})
-    ) else null;
+    );
 in
-builtins.filter (p: p != null)
 [
-  # if a patch has been merged, use
-  #   merged.staging = "<date>";
-  #   merged.master = "<date>";
-  # etc, where "date" is like "20240228181608"
-  # and can be found with `nix-repl  > :lf .  > lastModifiedDate`
-
   # TODO: apply this once it's fixed for aarch64
   # (fetchpatch' {
   #   title = "libvpx: fix cross compiling for armv7";