Remove coveralls report due to its unavailability (#3260)
Remove coveralls report due to its unavailability (#3260)


apache/skywalking,OpenSkywalking/skywalking,apache/skywalking,OpenSkywalking/skywalking,ascrutae/sky-walking,ascrutae/sky-walking,apache/skywalking,ascrutae/sky-walking,apache/skywalking,ascrutae/sky-walking,apache/skywalking,apache/skywalking,apache/skywalking