Cleanups from GHC 9.8 #2110

Job	Run time
Build Echidna on ubuntu-20.04	23m 6s
Build Echidna on ubuntu-20.04	23m 6s
Build Echidna on macos-13	41m 25s
Build Echidna on macos-13	41m 25s
Build Echidna on windows-latest	31m 23s
Build Echidna on windows-latest	31m 23s
Test with solc 0.4.25 on ubuntu-latest	3m 33s
Test with solc 0.4.25 on ubuntu-latest	3m 33s
Test with solc 0.5.7 on ubuntu-latest	3m 34s
Test with solc 0.5.7 on ubuntu-latest	3m 34s
Test with solc 0.6.12 on ubuntu-latest	3m 41s
Test with solc 0.6.12 on ubuntu-latest	3m 41s
Test with solc 0.7.5 on ubuntu-latest	3m 56s
Test with solc 0.7.5 on ubuntu-latest	3m 56s
Test with solc 0.4.25 on windows-latest	4m 9s
Test with solc 0.4.25 on windows-latest	4m 9s
Test with solc 0.5.7 on windows-latest	5m 4s
Test with solc 0.5.7 on windows-latest	5m 4s
Test with solc 0.6.12 on windows-latest	5m 2s
Test with solc 0.6.12 on windows-latest	5m 2s
Test with solc 0.7.5 on windows-latest	6m 50s
Test with solc 0.7.5 on windows-latest	6m 5s
	4h 22m 41s

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