Revert "feat: witness caching now operates on a bounded buffer" #2415

Job	Run time
linux	14m 1s
code-quality / lints	5m 44s
link-checker / linkChecker	7s
licenses-audits / cargo-deny (advisories, licenses, bans, ...)	48s
msrv / msrv	4m 27s
wasm / wasm-build	2m 23s
	27m 30s

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