[lua] Comment out print in utils.defaultIfNil()

[UmeboshiXI]

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What does this pull request do?

Comments out the debug print in utils.defaultIfNil(). Currently if used for a param(For example in a mobskill), it will print every time a param is defaulting if found to be nil(If param is not defined in the skill script).

Leaving it commented out incase anyone needs it but this will keep it from spamming map.exe.

Steps to test these changes

Have a mob use a mobskill, see that map doesn't get spammed with prints of unused params.