nushell: remove redundant abbreviations option

Nushell abbreviations are regular config settings, so users can already express them through programs.nushell.settings.abbreviations. Keep test coverage on that native path instead of maintaining a second option.

modules/programs/nushell.nix

@@ -191,21 +191,6 @@ in
       '';
     };
 
-    abbreviations = lib.mkOption {
-      type = types.attrsOf types.str;
-      default = { };
-      example = {
-        ll = "ls -l";
-        gs = "git status";
-      };
-      description = ''
-        An attribute set that maps each abbreviation (the top level attribute
-        names in this option) to its expansion. Unlike aliases, abbreviations
-        are expanded inline in the line editor when a space or enter is pressed,
-        so the expanded command is what ends up in the command history.
-      '';
-    };
-
     environmentVariables = lib.mkOption {
       type = types.attrsOf lib.hm.types.nushellValue;
       default = { };
@@ -247,16 +232,11 @@ in
             || cfg.extraConfig != ""
             || aliasesStr != ""
             || cfg.settings != { }
-            || cfg.abbreviations != { }
             || cfg.environmentVariables != { };
 
           aliasesStr = lib.concatLines (
             lib.mapAttrsToList (k: v: "alias ${toNushell { } k} = ${v}") cfg.shellAliases
           );
-
-          abbreviationsStr =
-            lib.optionalString (cfg.abbreviations != { })
-              "$env.config.abbreviations = ${toNushell { } cfg.abbreviations}";
         in
         lib.mkIf writeConfig {
           "${cfg.configDir}/config.nu".text = lib.mkMerge [
@@ -295,7 +275,6 @@ in
             (lib.mkIf (cfg.configFile != null) cfg.configFile.text)
             cfg.extraConfig
             aliasesStr
-            abbreviationsStr
           ];
         }
       )

tests/modules/programs/nushell/config-expected.nu

@@ -13,6 +13,8 @@ load-env {
     "PROMPT_COMMAND": ({|| "> "})
 }
 
+$env.config.abbreviations.gs = "git status"
+$env.config.abbreviations.ll = "ls -l"
 $env.config.display_errors.exit_code = false
 $env.config.hooks.pre_execution = [
     ({|| "pre_execution hook"})
@@ -29,8 +31,3 @@ let config = {
 alias "ll" = ls -a
 alias "multi word alias" = cd -
 alias "z" = __zoxide_z
-
-$env.config.abbreviations = {
-    "gs": "git status"
-    "ll": "ls -l"
-}

tests/modules/programs/nushell/example-settings.nix

@@ -38,12 +38,11 @@
       "z" = "__zoxide_z";
     };
 
-    abbreviations = {
-      "gs" = "git status";
-      "ll" = "ls -l";
-    };
-
     settings = {
+      abbreviations = {
+        "gs" = "git status";
+        "ll" = "ls -l";
+      };
       show_banner = false;
       display_errors.exit_code = false;
       hooks.pre_execution = [ (lib.hm.nushell.mkNushellInline ''{|| "pre_execution hook"}'') ];