delete tests for ChannelMetadata APIs
delete tests for ChannelMetadata APIs

mrpau/kolibri,rtibbles/kolibri,jamalex/kolibri,MingDai/kolibri,jonboiser/kolibri,DXCanas/kolibri,mrpau/kolibri,whitzhu/kolibri,benjaoming/kolibri,jayoshih/kolibri,DXCanas/kolibri,66eli77/kolibri,indirectlylit/kolibri,jamalex/kolibri,jonboiser/kolibri,rtibbles/kolibri,christianmemije/kolibri,learningequality/kolibri,whitzhu/kolibri,learningequality/kolibri,jtamiace/kolibri,MCGallaspy/kolibri,aronasorman/kolibri,mrpau/kolibri,whitzhu/kolibri,jonboiser/kolibri,lyw07/kolibri,jamalex/kolibri,ralphiee22/kolibri,MCGallaspy/kolibri,ralphiee22/kolibri,learningequality/kolibri,DXCanas/kolibri,66eli77/kolibri,jayoshih/kolibri,jamalex/kolibri,whitzhu/kolibri,indirectlylit/kolibri,jtamiace/kolibri,lyw07/kolibri,mrpau/kolibri,lyw07/kolibri,MCGallaspy/kolibri,christianmemije/kolibri,ralphiee22/kolibri,aronasorman/kolibri,66eli77/kolibri,MingDai/kolibri,MingDai/kolibri,ralphiee22/kolibri,indirectlylit/kolibri,christianmemije/kolibri,jtamiace/kolibri,MingDai/kolibri,benjaoming/kolibri,jayoshih/kolibri,lyw07/kolibri,indirectlylit/kolibri,rtibbles/kolibri,66eli77/kolibri,jayoshih/kolibri,christianmemije/kolibri,benjaoming/kolibri,jtamiace/kolibri,jonboiser/kolibri,aronasorman/kolibri,rtibbles/kolibri,learningequality/kolibri,aronasorman/kolibri,benjaoming/kolibri,DXCanas/kolibri