pandoc: drop obsolete patch

The linked pull request has since been merged and included with the
pandoc version we are shipping now (from stackage nightly).

pkgs/development/tools/pandoc/default.nix

@@ -8,24 +8,7 @@ in
     configureFlags = drv.configureFlags or [] ++ ["-fembed_data_files"];
     buildDepends = drv.buildDepends or [] ++ [haskellPackages.file-embed];
     buildTools = (drv.buildTools or []) ++ [ removeReferencesTo ];
-    patches = (drv.patches or []) ++ [
-      # Support citerefentry DocBook element.
-      # https://github.com/jgm/pandoc/pull/7437
-      (fetchpatch {
-        url = "https://github.com/jgm/pandoc/commit/06408d08e5ccf06a6a04c9b77470e6a67d98e52c.patch";
-        sha256 = "gOtrWVylzwgu0YLD4SztqlXxtaXXGOf8nTqLwUBS7qs=";
-      })
-    ];
-  }) static).overrideAttrs (drv: {
 
-    # These libraries are still referenced, because they generate
-    # a `Paths_*` module for figuring out their version.
-    # The `Paths_*` module is generated by Cabal, and contains the
-    # version, but also paths to e.g. the data directories, which
-    # lead to a transitive runtime dependency on the whole GHC distribution.
-    # This should ideally be fixed in haskellPackages (or even Cabal),
-    # but a minimal pandoc is important enough to patch it manually.
-    disallowedReferences = [ haskellPackages.pandoc-types haskellPackages.HTTP ];
     postInstall = drv.postInstall or "" + ''
       remove-references-to \
         -t ${haskellPackages.pandoc-types} \
@@ -34,4 +17,13 @@ in
         -t ${haskellPackages.HTTP} \
         $out/bin/pandoc
     '';
+  }) static).overrideAttrs (drv: {
+    # These libraries are still referenced, because they generate
+    # a `Paths_*` module for figuring out their version.
+    # The `Paths_*` module is generated by Cabal, and contains the
+    # version, but also paths to e.g. the data directories, which
+    # lead to a transitive runtime dependency on the whole GHC distribution.
+    # This should ideally be fixed in haskellPackages (or even Cabal),
+    # but a minimal pandoc is important enough to patch it manually.
+    disallowedReferences = [ haskellPackages.pandoc-types haskellPackages.HTTP ];
   })