chore(i18n): drop the On/Off option strings the switch row retired

Replacing the On/Off radio pair removed the only call sites for these two
keys. i18next cannot rebuild a key with no call-site default, so leaving
them in the catalogs forced them into the boot bundle as dead weight.
Removing them shrinks it by two entries instead.

src/renderer/src/i18n/locales/en.json

@@ -17106,9 +17106,7 @@
           "high": "High",
           "xhigh": "Extra high",
           "max": "Max",
-          "ultra": "Ultra",
-          "on": "On",
-          "off": "Off"
+          "ultra": "Ultra"
         },
         "pendingAttachmentLimit": "Too many attachments are waiting. Finish composing before attaching more.",
         "viewAttachment": "View image",

src/renderer/src/i18n/locales/es.json

@@ -14629,9 +14629,7 @@
           "high": "Alto",
           "xhigh": "Muy alto",
           "max": "Máximo",
-          "ultra": "Supremo",
-          "on": "Activado",
-          "off": "Desactivado"
+          "ultra": "Supremo"
         },
         "noCommandsOrSkills": "No hay comandos o habilidades coincidentes",
         "commands": "Comandos",

src/renderer/src/i18n/locales/fr.json

@@ -16043,9 +16043,7 @@
           "high": "Haute",
           "xhigh": "Extra élevé",
           "max": "Max",
-          "ultra": "Ultra",
-          "on": "Activé",
-          "off": "Désactivé"
+          "ultra": "Ultra"
         }
       },
       "tool": {

src/renderer/src/i18n/locales/ja.json

@@ -14664,9 +14664,7 @@
           "high": "高",
           "xhigh": "最高",
           "max": "最大",
-          "ultra": "ウルトラ",
-          "on": "オン",
-          "off": "オフ"
+          "ultra": "ウルトラ"
         },
         "noCommandsOrSkills": "一致するコマンドやスキルがありません",
         "commands": "コマンド",

src/renderer/src/i18n/locales/ko.json

@@ -14742,9 +14742,7 @@
           "high": "높음",
           "xhigh": "매우 높음",
           "max": "최대",
-          "ultra": "울트라",
-          "on": "켜짐",
-          "off": "꺼짐"
+          "ultra": "울트라"
         },
         "noCommandsOrSkills": "일치하는 명령어 또는 스킬이 없습니다",
         "commands": "명령어",

src/renderer/src/i18n/locales/zh.json

@@ -14707,9 +14707,7 @@
           "high": "高",
           "xhigh": "极高",
           "max": "最大",
-          "ultra": "极致",
-          "on": "开",
-          "off": "关"
+          "ultra": "极致"
         },
         "noCommandsOrSkills": "没有匹配的命令或技能",
         "commands": "命令",

src/renderer/src/i18n/native-chat-locales.test.ts

@@ -64,10 +64,6 @@ describe('native chat locale copy', () => {
         expect(composer.optionValue[key].trim()).not.toBe('')
         expect(composer.optionValue[key]).not.toBe(englishComposer.optionValue[key])
       }
-      // Why: On/Off loanwords are valid translations; only require non-empty.
-      for (const key of ['on', 'off'] as const) {
-        expect(composer.optionValue[key].trim()).not.toBe('')
-      }
     }
   )
 })