Not currently. Are these default values causing a problem, or is this just a question of personal style? The other refactoring operations (e.g. Change Signature) handle them quite happily.
If you are trying to avoid seeing these then this is going to effect Change Signature as well, which also adds them when you add a parameter with a default value.
It's "company style" - we aren't strict about it, but it is basically to allow commenting out larger sequences using /* */ (defaults get documented in the comment above)
>> If you are trying to avoid seeing these then this is going to effect Change Signature as well Which would be quite good :)
Since we already offer a degree of control over the formatting of new functions when refactoring this is a reasonable option to add, so I have put in feature request