Deletes the part inventory balance record identified by `partInventoryBalanceId`. 
Use this to remove a balance row entirely, such as when a part is retired from a given inventory asset (warehouse, bin, or storeroom location) 
and its on-hand/on-order/reserved quantities should no longer be tracked there.

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### Parameters
**partInventoryBalanceId** `Integer`: Id of part inventory balance to delete<br />
**userId** `Integer`:Id of the user executing the function<br />

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### Returns
**# of records modified** `Integer`<br />
**message** `String` None if success<br />

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### Example
```python
# Remove an inventory balance record for a discontinued filter part
partInventoryBalanceId = 578
userId = system.kanoa.security.getIDPUserId({'userName': 'SYSTEM'})
recordsModified, message = system.kanoa.inventory.deletePartInventoryBalance(partInventoryBalanceId, userId)
print recordsModified, message
```