refactor(checkout): remove unused completion endpoint

app/Domains/Purchase/Services/Checkout/CompleteCheckoutService.php

@@ -18,33 +18,6 @@ class CompleteCheckoutService
         private readonly PurchaseStateGuard $purchaseState,
     ) {}
 
-    public function complete(Purchase $purchase): Purchase
-    {
-        return DB::transaction(function () use ($purchase): Purchase {
-            $purchase = $this->lockPurchase($purchase);
-            $this->purchaseState->assertNotExpired($purchase);
-
-            if ($purchase->payment_method === null) {
-                throw ValidationException::withMessages([
-                    'payment_method' => __('api.purchase.payment_method_required'),
-                ]);
-            }
-
-            if ($this->isTerminal($purchase)) {
-                return $this->loadPurchase($purchase);
-            }
-
-            $this->purchaseState->lockCurrentCart($purchase);
-
-            $purchase->update([
-                'status' => Purchase::STATUS_PENDING_PAYMENT,
-                'total' => $purchase->calculateCurrentTotalAmount(),
-            ]);
-
-            return $this->loadPurchase($purchase);
-        });
-    }
-
     public function submitForReview(Purchase $purchase): Purchase
     {
         return DB::transaction(function () use ($purchase): Purchase {
@@ -171,18 +144,6 @@ class CompleteCheckoutService
         });
     }
 
-    private function isTerminal(Purchase $purchase): bool
-    {
-        return in_array($purchase->status, [
-            Purchase::STATUS_PAID,
-            Purchase::STATUS_IN_REVIEW,
-            Purchase::STATUS_CANCELLED,
-            Purchase::STATUS_REJECTED,
-            Purchase::STATUS_EXPIRED,
-            Purchase::STATUS_SUPERSEDED,
-        ], true);
-    }
-
     private function lockPurchase(Purchase $purchase): Purchase
     {
         /** @var Purchase */