Cleanup: remove internal references and scaffolding

cardano_checkout/scheduler.py

@@ -6,13 +6,6 @@ The scheduler drives two jobs against a consumer-supplied
 - :func:`cardano_checkout.monitor.check_pending_invoices` — every 15 seconds
 - :func:`cardano_checkout.monitor.reprice_expired_invoices` — every 60 seconds
 
-That's the *full* SDK job surface. The subscription-level + grace-period
-jobs that the original the host app scheduler shipped are the host app-specific
-(they touch ``Company``, ``Subscription``, ``SubscriptionPayment`` models
-that are merchant-specific) — those live in
-:mod:`cardano_checkout.hostapp_compat` so the host app can still import the
-exact wrappers it has always used, without polluting the generic SDK.
-
 Usage::
 
     from cardano_checkout.scheduler import InvoiceScheduler
@@ -54,7 +47,7 @@ class InvoiceScheduler:
         store: Persistence backend. Required.
         koios_url: Chain-query endpoint. Override for testnet / custom gateways.
         check_interval_seconds: How often to poll Koios for pending invoices.
-            Defaults to 15 — identical to the host app's production cadence.
+            Defaults to 15.
         reprice_interval_seconds: How often to sweep for expired invoices.
             Defaults to 60.
         payment_window_minutes: Re-expiry window when repricing.
@@ -87,9 +80,8 @@ class InvoiceScheduler:
 
     async def _job_reprice_expired(self) -> None:
         if self.price_fn is None:
-            # No oracle wired — skip repricing silently. Consumers that
-            # don't care about the USD-lock workflow (e.g. fixed-ADA
-            # invoices) will never configure a price_fn; that's fine.
+            # No oracle wired — skip repricing. Fixed-ADA invoices don't
+            # need one.
             return
         try:
             await reprice_expired_invoices(
@@ -149,12 +141,9 @@ class InvoiceScheduler:
 
 
 # ---------------------------------------------------------------------------
-# Backwards-compatible free-function API
+# Free-function API around a module-level default instance.
+# Prefer the InvoiceScheduler class for anything nontrivial.
 # ---------------------------------------------------------------------------
-#
-# Early adopters may have imported ``start_cardano_scheduler`` / ``stop_cardano_scheduler``
-# directly. Provide those as thin wrappers around a module-level default instance.
-# Using the InvoiceScheduler class is preferred for anything nontrivial.
 
 _default: Optional[InvoiceScheduler] = None