docs(migration) : resolve.concord no longer exists

[jeffin143]

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Handles : #2676

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[jeffin143]

@EugeneHlushko @montogeek
There seem to be lot of issues which states that Following option should be added in migration docs that it has been depreciated

So should I add a new Section as ##### Depreciated/Removed options Similar to

Update outdated options

instead of the present approach where I add a separate heading for one option

[jeffin143]

Ping @montogeek

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