fix: scheme errcheck issues (#28543)

server/.golangci.yml

@@ -89,7 +89,6 @@ issues:
         channels/api4/reaction_test.go|\
         channels/api4/remote_cluster.go|\
         channels/api4/role_test.go|\
-        channels/api4/scheme.go|\
         channels/api4/scheme_test.go|\
         channels/api4/shared_channel.go|\
         channels/api4/status.go|\