Revert "sadasd"

This reverts commit 9f85ce4f52.

backend/igny8_core/business/billing/models.py

@@ -215,12 +215,6 @@ class Invoice(AccountBaseModel):
     # Metadata
     notes = models.TextField(blank=True)
     metadata = models.JSONField(default=dict)
-    pdf_file = models.FileField(
-        upload_to='invoices/pdf/%Y/%m/',
-        null=True,
-        blank=True,
-        help_text='Generated PDF invoice file'
-    )
     
     created_at = models.DateTimeField(auto_now_add=True)
     updated_at = models.DateTimeField(auto_now=True)