asciidoctor-with-extensions: remove asciidoctor-mathematical extension

Fails to build:

https://github.com/asciidoctor-contrib/asciidoctor-mathematical/issues/131

And upstream seems inactive in general.

doc/release-notes/rl-2511.section.md

@@ -94,6 +94,8 @@
 
 - `conduwuit` was removed due to upstream ceasing development and deleting their repository. For existing data, a migration to `matrix-conduit`, `matrix-continuwuity` or `matrix-tuwunel` may be possible.
 
+- `asciidoctor-with-extension` had its `asciidoctor-mathematical` extension removed, because it fails to build, and it is not maintained properly.
+
 - The `ghcInfo` and `controlPhases` functions have been removed from `haskell.lib.compose` and `haskell.lib`. They were unused and would return incorrect results.
 
   - Instead of using `controlPhases`, the `doCheck` attribute of derivations can be accessed which is more accurate. `doBenchmark` can't be introspected at the moment.

pkgs/tools/typesetting/asciidoctor-with-extensions/Gemfile

@@ -4,7 +4,6 @@ gem 'asciidoctor-bibtex'
 gem 'asciidoctor-diagram'
 gem 'asciidoctor-epub3'
 gem 'asciidoctor-html5s'
-gem 'asciidoctor-mathematical'
 gem 'asciidoctor-multipage'
 gem 'asciidoctor-pdf'
 gem 'asciidoctor-reducer'

pkgs/tools/typesetting/asciidoctor-with-extensions/Gemfile.lock

@@ -29,10 +29,6 @@ GEM
     asciidoctor-html5s (0.5.1)
       asciidoctor (>= 1.5.7, < 3.0)
       thread_safe (~> 0.3.4)
-    asciidoctor-mathematical (0.3.5)
-      asciidoctor (~> 2.0)
-      asciimath (~> 2.0)
-      mathematical (~> 1.6.0)
     asciidoctor-multipage (0.0.19)
       asciidoctor (>= 2.0.11, < 2.1)
     asciidoctor-pdf (2.3.19)
@@ -50,7 +46,6 @@ GEM
       asciidoctor (~> 2.0)
     asciidoctor-revealjs (5.1.0)
       asciidoctor (>= 2.0.0, < 3.0.0)
-    asciimath (2.0.5)
     bibtex-ruby (6.1.0)
       latex-decode (~> 0.0)
       racc (~> 1.7)
@@ -75,8 +70,6 @@ GEM
     hashery (2.1.2)
     latex-decode (0.4.0)
     logger (1.6.1)
-    mathematical (1.6.20)
-      ruby-enum (>= 0.4, < 2.0)
     matrix (0.4.2)
     mime-types (3.6.0)
       logger
@@ -119,7 +112,6 @@ GEM
       ffi (~> 1.0)
     rexml (3.3.9)
     rouge (4.4.0)
-    ruby-enum (1.0.0)
     ruby-rc4 (0.1.5)
     rubyzip (2.3.2)
     sass (3.7.4)
@@ -141,7 +133,6 @@ DEPENDENCIES
   asciidoctor-diagram
   asciidoctor-epub3
   asciidoctor-html5s
-  asciidoctor-mathematical
   asciidoctor-multipage
   asciidoctor-pdf
   asciidoctor-reducer
@@ -151,4 +142,4 @@ DEPENDENCIES
   rouge
 
 BUNDLED WITH
-   2.5.16
+   2.5.22

pkgs/tools/typesetting/asciidoctor-with-extensions/gemset.nix

@@ -134,21 +134,6 @@
     };
     version = "0.5.1";
   };
-  asciidoctor-mathematical = {
-    dependencies = [
-      "asciidoctor"
-      "asciimath"
-      "mathematical"
-    ];
-    groups = [ "default" ];
-    platforms = [ ];
-    source = {
-      remotes = [ "https://rubygems.org" ];
-      sha256 = "1lxfq7qn3ql642pva6jh3h1abm9j9daxg5icfn1h73k6cjsmcisp";
-      type = "gem";
-    };
-    version = "0.3.5";
-  };
   asciidoctor-multipage = {
     dependencies = [ "asciidoctor" ];
     groups = [ "default" ];
@@ -204,16 +189,6 @@
     };
     version = "5.1.0";
   };
-  asciimath = {
-    groups = [ "default" ];
-    platforms = [ ];
-    source = {
-      remotes = [ "https://rubygems.org" ];
-      sha256 = "1ny2qql3lgh7gx54psji2lm4mmbwyiwy00a17w26rjyh6cy55491";
-      type = "gem";
-    };
-    version = "2.0.5";
-  };
   bibtex-ruby = {
     dependencies = [
       "latex-decode"
@@ -363,17 +338,6 @@
     };
     version = "1.6.1";
   };
-  mathematical = {
-    dependencies = [ "ruby-enum" ];
-    groups = [ "default" ];
-    platforms = [ ];
-    source = {
-      remotes = [ "https://rubygems.org" ];
-      sha256 = "0y103dvfjswm5r0xafyjrw6ybvz1qrqfa4lvpk9gdhbzwpaiwy4r";
-      type = "gem";
-    };
-    version = "1.6.20";
-  };
   matrix = {
     groups = [ "default" ];
     platforms = [ ];
@@ -617,16 +581,6 @@
     };
     version = "4.4.0";
   };
-  ruby-enum = {
-    groups = [ "default" ];
-    platforms = [ ];
-    source = {
-      remotes = [ "https://rubygems.org" ];
-      sha256 = "1ry6ha94a5jqbj5y3x9k0szyy3jgnsfyxvva98nivg6yx1dfyrz7";
-      type = "gem";
-    };
-    version = "1.0.0";
-  };
   ruby-rc4 = {
     groups = [ "default" ];
     platforms = [ ];