[MM-60932] Fix errcheck issues in server/channels/api4/usage.go (#28641)

server/.golangci.yml

@@ -99,7 +99,6 @@ issues:
         channels/api4/team_local.go|\
         channels/api4/team_test.go|\
         channels/api4/upload_test.go|\
-        channels/api4/usage.go|\
         channels/api4/usage_test.go|\
         channels/api4/user.go|\
         channels/api4/user_local.go|\