chore(release): remove legacy `VERSION` file #5

Job	Run time
ci / lint / lint	20s
ci / validate / validate	15s
ci / documentation / readme	14s
ci / code-analysis / code-analysis	9s
ci / examples / examples	18s
ci / generator / generate	11s
ci / generator / run (0.13.7, 1.31)	7s
ci / generator / run (0.13.7, 2.0)	8s
ci / generator / run (0.13.7, 3.0)	10s
ci / generator / run (0.14.11, 1.31)	6s
ci / generator / run (0.14.11, 2.0)	7s
ci / generator / run (0.14.11, 3.0)	7s
ci / generator / run (0.15.5, 1.31)	6s
ci / generator / run (0.15.5, 2.0)	9s
ci / generator / run (0.15.5, 3.0)	8s
ci / generator / run (1.0.11, 1.31)	9s
ci / generator / run (1.0.11, 2.0)	7s
ci / generator / run (1.0.11, 3.0)	9s
ci / generator / run (1.1.9, 1.31)	7s
ci / generator / run (1.1.9, 2.0)	6s
ci / generator / run (1.1.9, 3.0)	11s
ci / generator / run (1.2.9, 1.31)	5s
ci / generator / run (1.2.9, 2.0)	8s
ci / generator / run (1.2.9, 3.0)	8s
ci / generator / run (1.3.10, 1.31)	5s
ci / generator / run (1.3.10, 2.0)	8s
ci / generator / run (1.3.10, 3.0)	9s
ci / generator / run (1.4.7, 1.31)	8s
ci / generator / run (1.4.7, 2.0)	10s
ci / generator / run (1.4.7, 3.0)	8s
ci / generator / run (1.5.7, 1.31)	9s
ci / generator / run (1.5.7, 2.0)	8s
ci / generator / run (1.5.7, 3.0)	9s
	4m 59s

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