Unmark reading feature flags as deprecated

Nimbus doesn't provide a proper replacement yet, as we can't have
multiple experiments affecting the same user, rollouts aren't
immediate, and we can't allowlist specific users, so reading
feature flags is fine for now.

I don't think we'll need to write new code to modify the flags (we
have the admin UI for that already), so I'm leaving those marked
as deprecated.

src/db/tables/featureFlags.ts

@@ -37,7 +37,6 @@ export async function getDeletedFeatureFlags() {
     .returning("*");
 }
 
-/** @deprecated The method type not be used */
 export type FeatureFlagName =
   | "RedesignedEmails"
   | "UpdatedEmailPreferencesOption"
@@ -56,7 +55,6 @@ export type FeatureFlagName =
 
 /**
  * @param options
- * @deprecated The method should not be used, use Nimbus experiment or roll-out: /src/app/functions/server/getExperiments
  */
 export async function getEnabledFeatureFlags(
   options: