Remove incorrect sum_distinct example YAML snippet

Generated-By: mintlify-agent

Author: mintlify[bot]

references/metrics.mdx

@@ -974,38 +974,6 @@ If the value you are aggregating is truly distinct based on the distinct key (e.
   </Tab>
 </Tabs>
 
-**Using multiple distinct keys**
-
-If you need to factor in multiple fields for deduplication, you can specify multiple keys. For example, if you want to sum values that are unique per combination of `order_id` AND `shipping_cost`:
-
-```yaml
-metrics:
-  total_line_item_revenue_deduped:
-    type: sum_distinct
-    sql: ${line_item_total}
-    distinct_keys: [line_item_id]
-    description: >
-      Total line item revenue correctly deduped. Each line item's total is
-      summed once, regardless of how many payments the order has.
-    format: usd
-    round: 2
-```
-
-Or to deduplicate by multiple fields:
-
-```yaml
-metrics:
-  total_shipping_cost:
-    type: sum_distinct
-    sql: ${order_shipping_cost}
-    distinct_keys: [order_id, order_shipping_cost]
-```
-
-<Note>
-When using multiple distinct keys, a row is considered unique only when the entire combination of key values is unique.
-</Note>
-
-
 ### string
 
 Used with fields that include letters or special characters.