Remove the one-time env-to-config migration from the settings

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/i18n/en.ts

@@ -64,12 +64,6 @@ export const en = {
   "settings.budgetWarning": "Warn at",
   "settings.adminKey": "Admin key (optional)",
   "settings.adminKeyHint": "Anthropic Admin API key (sk-ant-admin01-…) to show the real, organisation-wide monthly cost.",
-  "settings.envTitle": "Settings from environment variables",
-  "settings.envHint": "These ${NAME} references take their values from the server's environment (.env). Move the values into the configuration so everything is set here – then remove the variables from .env.",
-  "settings.envApply": "Move into the configuration",
-  "settings.envConfirm": "Write the current values of {names} into the configuration file? Keys are then stored in the config (and in its backups) instead of the environment.",
-  "settings.envDone": "{n} values moved into the configuration. You can now remove them from .env.",
-  "settings.envUnset": "Referenced but not set (left as they are):",
   "settings.fetchPrices": "Fetch prices",
   "settings.pricesFetched": "Prices updated for {n} models – save to keep them.",
   "stats.perMillion": "per 1M tok",