How to drop SQL default constraint without knowing its name?

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In Microsoft SQL Server, I know the query to check if a default constraint exists for a column and drop a default constraint is:

IF EXISTS(SELECT * FROM sysconstraints
  WHERE id=OBJECT_ID('SomeTable')
  AND COL_NAME(id,colid)='ColName'
  AND OBJECTPROPERTY(constid, 'IsDefaultCnst')=1)    
ALTER TABLE SomeTable DROP CONSTRAINT DF_SomeTable_ColName

But due to typo in previous versions of the database, the name of the constraint could be DF_SomeTable_ColName or DF_SmoeTable_ColName.

How can I delete the default constraint without any SQL errors? Default constraint names don’t show up in INFORMATION_SCHEMA table, which makes things a bit trickier.

So, something like ‘delete the default constraint in this table/column’, or ‘delete DF_SmoeTable_ColName‘, but don’t give any errors if it can’t find it.

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