internal: remove disabled code in `liftdestructors` #3875

Job	Run time
Provide additional context for the workflow	5s
Build release binaries (Linux)	11m 15s
Build release binaries (macOS)	12m 48s
Build docs and release artifacts (Linux)	11m 19s
Build docs and release artifacts (macOS)	11m 28s
Build and test tooling (Linux)	4m 54s
Build and test tooling (macOS)	5m 49s
Test the compiler and stdlib (Linux, batch #0)	9m 7s
Test the compiler and stdlib (Linux, batch #1)	8m 30s
Test the compiler and stdlib (macOS, batch #0)	10m 39s
Test the compiler and stdlib (macOS, batch #1)	10m 7s
Build source archive	5m 7s
Build release artifacts from source archive (Linux)	14m 29s
Build release artifacts from source archive (macOS)	15m 18s
Test release artifacts	1m 55s
All check passed	1s
	2h 12m 51s

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