chore(units): drop the preference loader nothing calls yet

src/lib/measurements/unit-preferences.ts

@@ -1,26 +0,0 @@
-/**
- * Server-side read of a record's two unit preferences.
- *
- * Every text the server writes for a person to read — a status note, a period
- * narrative, a score label — quotes numbers, and a number is only right in the
- * unit its reader chose. This is the one read those producers share, so none
- * of them can load `unitPreference` and forget `glucoseUnit` or the reverse.
- */
-import { prisma } from "@/lib/db";
-
-import {
-  DEFAULT_UNIT_PREFERENCES,
-  resolveUnitPreferences,
-  type UnitPreferences,
-} from "./display-transform";
-
-/** Both preferences of one record; the defaults when the row is gone. */
-export async function loadUnitPreferences(
-  userId: string,
-): Promise<UnitPreferences> {
-  const row = await prisma.user.findUnique({
-    where: { id: userId },
-    select: { unitPreference: true, glucoseUnit: true },
-  });
-  return row ? resolveUnitPreferences(row) : DEFAULT_UNIT_PREFERENCES;
-}