The quote, infrequently repeated by some, is from an EC bishop. It anticipates a future reunion of EOs and Catholics, at which point separate jurisdictions would no longer be necessary for ECCs and their EO counterparts. The bishop neglected to consider churches like the Maronites, or the broader implications of the existence of overlapping jurisdictions, or the inaptness of the phrase when talking of regions where the ECs considerably outnumber or even antedate their EO counterparts. He really didn’t consider anythign about the administrative nature of a re-united church.
The quote has nothing to do with a liquidation of Greek Catholic churches, let alone a call for this from Rome - so yes the original question is really far fetched.