refactor: Clean up imports and unused variables in ticket-related components

- Remove unused imports from PurchaseTicketDialog.vue and useUserTickets.ts for improved code clarity.
- Update events.ts to eliminate the unused paymentRequest parameter in payInvoiceWithWallet function.
- Simplify MyTickets.vue by removing the unused unregisteredTickets variable and related QR code generation logic, enhancing maintainability.

src/components/events/PurchaseTicketDialog.vue

@@ -1,6 +1,6 @@
 <!-- eslint-disable vue/multi-word-component-names -->
 <script setup lang="ts">
-import { ref, onUnmounted } from 'vue'
+import { onUnmounted } from 'vue'
 import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogDescription } from '@/components/ui/dialog'
 import { Button } from '@/components/ui/button'
 import { Badge } from '@/components/ui/badge'
@@ -30,7 +30,7 @@ const {
   isLoading,
   error,
   paymentHash,
-  paymentRequest,
+
   qrCode,
   isPaymentPending,
   isPayingWithWallet,