tai64

Revert "const-oid: add `ObjectIdentifierRef`; use for `db` (#1212)" (… #1778

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	1m 43s
test (1.65.0)	1m 36s
build (1.65.0, wasm32-unknown-unknown)	1m 35s
test (stable)	15s
build (stable, thumbv7em-none-eabi)	18s
build (stable, wasm32-unknown-unknown)	18s
minimal-versions / minimal-versions	23s
	6m 8s

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