chore: remove obsolete nft_custody_unanchored table (#2190) #2666

Job	Run time
lint	53s
test-rosetta (rosetta)	3m 3s
test (api)	9m 58s
test-2_5 (block-zero-handling)	1m 19s
test (bns)	3m 9s
test-rosetta (rosetta-construction)	2m 12s
test-2_5 (faucet-stx)	1m 21s
test (bns-e2e)	6m 56s
test-rosetta (rosetta-cli-data)	2m 11s
test-2_5 (pox-4-btc-address-formats)	2m 15s
test (btc-faucet)	1m 32s
test-rosetta (rosetta-cli-construction)	2m 39s
test-2_5 (pox-4-delegate-aggregation)	1m 51s
test (event-replay)	1m 50s
test-2_5 (pox-4-delegate-stacking)	1m 49s
test (rpc)	1m 26s
test-2_5 (pox-4-delegate-revoked-stacking)	1m 58s
test-2_5 (pox-4-stack-extend-increase)	2m 9s
test-2_5 (pox-4-rosetta-btc-addr-types)	4m 53s
test-2_5 (pox-4-rosetta-cycle-phases)	1m 17s
test-2_5 (pox-4-rosetta-segwit)	1m 30s
test-2_5 (pox-4-burnchain-stack-stx)	1m 31s
test-2_5 (pox-4-burnchain-delegate-stx)	2m 8s
build-publish	1m 52s
	1h 1m 42s

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