refactor(abstract-utxo): delete unreachable utxolib explainPsbt path #2986

Job	Run time
Generate head API spec	6m 9s
Generate merge base API spec	8m 54s
Check specs identical	0s
Generate vacuum reports for API spec	0s
Check breaking changes	0s
API Spec Check	2s
Linter Override	-1s
	15m 4s

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