rubyMinimal: remove

Due to being unused, and seemingly unusable, added appropriate release
notes.

nixos/doc/manual/release-notes/rl-2103.xml

@@ -89,6 +89,18 @@
      user D-Bus session available also for non-graphical logins.
     </para>
    </listitem>
+   <listitem>
+     <para>
+       <literal>rubyMinimal</literal> was removed due to being unused and
+       unusable. The default ruby interpreter includes JIT support, which makes
+       it reference it's compiler. Since JIT support is probably needed by some
+       Gems, it was decided to enable this feature with all cc references by
+       default, and allow to build a Ruby derivation without references to cc,
+       by setting <literal>jitSupport = false;</literal> in an overlay. See
+       <link xlink:href="https://github.com/NixOS/nixpkgs/pull/90151">#90151</link>
+       for more info.
+     </para>
+   </listitem>
    <listitem>
     <para>
      The option <option>fonts.enableFontDir</option> has been renamed to

pkgs/development/interpreters/ruby/default.nix

@@ -57,9 +57,8 @@ let
       # Since some Gems require JIT support, there's probably no
       # escape from this reference. Hence, it was decided to enable this
       # feature by default, as it's enabled by default by ruby's ./configure
-      # script. We do disable this feature though for the other cc references
-      # in all of the locations given above for the `rubyMinimal` build defined
-      # in all-packages.nix.
+      # script. If you'd like to have a ruby without reference to cc, setting
+      # jitSupport to false should remove all known references mentioned above.
       , removeReferencesTo, jitSupport ? true
       , autoreconfHook, bison, autoconf
       , buildEnv, bundler, bundix

pkgs/top-level/aliases.nix

@@ -501,6 +501,7 @@ mapAliases ({
   ruby_2_5_0 = throw "ruby_2_5_0 was deprecated on 2018-02-13: use a newer version of ruby";
   rubyPackages_2_4 = throw "rubyPackages_2_4 was deprecated in 2019-12: use a newer version of rubyPackages instead";
   rubygems = throw "rubygems was deprecated on 2016-03-02: rubygems is now bundled with ruby";
+  rubyMinimal = throw "rubyMinimal was removed due to being unused";
   rxvt_unicode-with-plugins = rxvt-unicode; # added 2020-02-02
   rxvt_unicode = rxvt-unicode-unwrapped; # added 2020-02-02
   urxvt_autocomplete_all_the_things = rxvt-unicode-plugins.autocomplete-all-the-things; # added 2020-02-02

pkgs/top-level/all-packages.nix

@@ -10545,20 +10545,6 @@ in
     ruby_2_6
     ruby_2_7;
 
-  rubyMinimal = ruby.override {
-    # gem support is minimal overhead
-    rubygemsSupport = true;
-    jitSupport = false;
-    useRailsExpress = false;
-    zlibSupport = false;
-    opensslSupport = false;
-    gdbmSupport = false;
-    cursesSupport = false;
-    docSupport = false;
-    yamlSupport = false;
-    fiddleSupport = false;
-  };
-
   ruby = ruby_2_6;
   rubyPackages = rubyPackages_2_6;