docbook-xsl: remove nixos-specific patch

we're no longer using docbook to render the manpages, so we don't need
this patch for our manuals to be usable. remove it to reduce the diff
between nixos and other distros for this package.

pkgs/data/sgml+xml/stylesheets/xslt/docbook-xsl/default.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, substituteAll, fetchurl, fetchpatch, findXMLCatalogs, writeScriptBin, ruby, bash, withManOptDedupPatch ? false }:
+{ lib, stdenv, substituteAll, fetchurl, fetchpatch, findXMLCatalogs, writeScriptBin, ruby, bash }:
 
 let
 
@@ -36,10 +36,6 @@ let
           src = ./catalog-legacy-uris.patch;
           inherit legacySuffix suffix version;
         })
-      ] ++ lib.optionals withManOptDedupPatch [
-        # Fixes https://github.com/NixOS/nixpkgs/issues/166304
-        # https://github.com/docbook/xslt10-stylesheets/pull/241
-        ./fix-man-options-duplication.patch
       ];
 
       propagatedBuildInputs = [ findXMLCatalogs ];

pkgs/data/sgml+xml/stylesheets/xslt/docbook-xsl/fix-man-options-duplication.patch

@@ -1,11 +0,0 @@
---- a/manpages/lists.xsl
-+++ b/manpages/lists.xsl
-@@ -110,7 +110,7 @@
-   <xsl:text>.RE&#10;</xsl:text>
- </xsl:template>
- 
--<xsl:template match="d:varlistentry/d:term"/>
-+<xsl:template match="d:varlistentry/d:term" priority="1"/>
- <xsl:template match="d:glossentry/d:glossterm"/>
- 
- <xsl:template match="d:variablelist[ancestor::d:listitem or ancestor::d:step or ancestor::d:glossdef]|