Remove Shelley style certs in Dijkstra era #19728

Job	Run time
build (9.12.2, ubuntu-latest)	1m 14s
cabal-format	8s
Check branch history	12s
Check that there are no additions of `undefined`s in the PR diff	12s
build (9.6.7, ubuntu-latest)	1m 7s
shellcheck	6s
Check if formal-ledger-specifications SRP is valid	28s
build (9.10.2, ubuntu-latest)	1m 13s
build (9.8.4, ubuntu-latest)	1m 12s
fourmolu	40s
gen-hie	1m 13s
Tests completed	3s
${{ matrix.package }}-${{ matrix.ghc }}-${{ matrix.os }}	1s
codegen	1s
Send a slack notification on \#ledger-internal if the nightly build failed	1s
	7m 51s

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