ci: remove megacheck linter #258

Job	Run time
go-versions / go-versions	5s
Windows, Go 1.23	1m 2s
Windows, Go 1.22	1m 59s
Windows, Go 1.18	58s
Linux, Go 1.18 / Unit Tests and Coverage	1m 7s
Linux, Go 1.18 / Contract Tests	26s
Linux, Go 1.18 / Benchmarks	4m 46s
Linux, Go 1.22 / Contract Tests	18s
Linux, Go 1.22 / Unit Tests and Coverage	1m 11s
Linux, Go 1.22 / Benchmarks	4m 34s
Linux, Go 1.23 / Benchmarks	4m 45s
Linux, Go 1.23 / Contract Tests	26s
Linux, Go 1.23 / Unit Tests and Coverage	1m 21s
	22m 58s

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