remove cron.py file

cerley beat worker redis
setting for cerley

backend/product/tasks.py

@@ -0,0 +1,8 @@
+from celery import shared_task
+from product.models import ProductVariant
+
+@shared_task
+def update_product_prices():
+    print("\033[92m Calling update product prices from Celery\033[00m")
+    ProductVariant.update_all_prices()
+    print("\033[92m its working\033[00m")