ci(build.yml): Remove unsused env variable NODE #1073

Job	Run time
test (ubuntu-latest, 26.3, false)	28s
test (ubuntu-latest, 27.2, false)	28s
test (ubuntu-latest, 28.2, false)	31s
test (ubuntu-latest, 29.4, false)	39s
test (macos-latest, 28.2, false)	1m 10s
test (macos-latest, 29.4, false)	1m 37s
test (windows-latest, 26.3, false)	4m 53s
test (windows-latest, 27.2, false)	2m 38s
test (windows-latest, 28.2, false)	1m 33s
test (windows-latest, 29.4, false)	3m 10s
test (ubuntu-latest, snapshot, true)	31s
test (macos-latest, snapshot, true)	1m 6s
test (windows-latest, snapshot, true)	4m 53s
	23m 37s

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