Remove dependency on GNAT CE when building branch #43

Job	Run time
sanity-check (ubuntu-latest, 2.0.0)	20s
sanity-check (ubuntu-latest, 1.2.2)	20s
sanity-check (ubuntu-latest, nightly)	24s
sanity-check (ubuntu-latest, source, master)	3m 18s
sanity-check (macos-latest, 2.0.0)	38s
sanity-check (macos-latest, 1.2.2)	42s
sanity-check (macos-latest, nightly)	26s
sanity-check (macos-latest, source, master)	3m 20s
sanity-check (windows-latest, 2.0.0)	3m 16s
sanity-check (windows-latest, 1.2.2)	3m 17s
sanity-check (windows-latest, nightly)	3m 13s
sanity-check (windows-latest, source, master)	3m 4s
	22m 18s

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