Remove appveyor.yml #194

Job	Run time
Check (ubuntu-latest, default)	1m 7s
Check (ubuntu-latest, bundled)	1m 1s
Check (ubuntu-latest, bundled_without_openssl)	1m 1s
Check (ubuntu-latest, buildtime_bindgen)	56s
Check (macos-13, default)	1m 32s
Check (macos-13, bundled)	1m 37s
Check (macos-13, bundled_without_openssl)	2m 33s
Check (macos-13, buildtime_bindgen)	2m 24s
Check (macos-14, default)	46s
Check (macos-14, bundled)	51s
Check (macos-14, bundled_without_openssl)	50s
Check (macos-14, buildtime_bindgen)	1m 2s
Check (windows-2019, default)	9m 15s
Check (windows-2019, bundled)	11m 14s
Check (windows-2019, bundled_without_openssl)	2m 48s
Check (windows-2019, buildtime_bindgen)	8m 23s
	47m 20s

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