linux

remove msys2 from ci #15

Job	Run time
perl (5.41)	45s
perl (5.40, ALIEN_DOWNLOAD_RULE=warn)	46s
perl (5.40, ALIEN_DOWNLOAD_RULE=digest)	51s
perl (5.40, ALIEN_DOWNLOAD_RULE=encrypt)	47s
perl (5.40, ALIEN_DOWNLOAD_RULE=digest_or_encrypt)	44s
perl (5.40, ALIEN_DOWNLOAD_RULE=digest_and_encrypt)	46s
perl (5.40)	49s
perl (5.38)	44s
perl (5.36)	44s
perl (5.34)	49s
perl (5.32)	48s
perl (5.30)	44s
perl (5.28)	43s
perl (5.26)	44s
perl (5.24)	44s
perl (5.22)	43s
perl (5.20)	49s
perl (5.18)	1m 53s
perl (5.16)	1m 46s
perl (5.14)	3m 57s
perl (5.12)	50s
perl (5.10.1)	1m 49s
	23m 15s

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