Removing obsolete properties from `MessageTest`.
Removing obsolete properties from `MessageTest`.

SensCritique/lithium,wbeater/lithium,UnionOfRAD/lithium,qoqa/lithium,SensCritique/lithium,jails/lithium,whowgames/lithium,m4rcsch/lithium-core-library,datachand/lithium,qoqa/lithium,mehlah/lithium,davidpersson/lithium,m4rcsch/li3_framework,muyehub/lithium,davidpersson/lithium,jails/lithium,mehlah/lithium,UnionOfRAD/framework,wbeater/lithium,graphis/lithium,m4rcsch/lithium-core-library,UnionOfRAD/lithium,muyehub/lithium,pixelcog/lithium,graphis/lithium,pixelcog/lithium,datachand/lithium,whowgames/lithium