GitHub CI: Remove openSUSE build job #580

Job	Run time
Build Netatalk testsuite container	1m 23s
Build Netatalk container	1m 14s
Netatalk container dry run	6s
AFP login test - AFP 3.4	8s
AFP login test - AFP 2.1	8s
AFP spec test (Readonly) - AFP 2.1	11s
AFP lantest	14s
AFP spec test (Readonly) - AFP 3.4	10s
AFP spec test - AFP 2.1	58s
AFP spec test - AFP 2.2	1m 1s
AFP spec test - AFP 3.1	1m 7s
AFP spec test - AFP 3.2	1m 5s
AFP spec test - AFP 3.3	1m 10s
AFP spec test - AFP 3.0	1m 7s
AFP spec test - AFP 3.4	1m 7s
AFP speedtest	8s
	11m 17s

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