grafana-agent: remove deprecated fields in test
grafana-agent: remove deprecated fields in test

Signed-off-by: Robbie Lankford <a694ed5d2af184717afe6b1b488fcc33ddbdcea1@grafana.com>

sjackman/homebrew-core,adam-moss/homebrew-core,nandub/homebrew-core,stgraber/homebrew-core,filcab/homebrew-core,nandub/homebrew-core,zyedidia/homebrew-core,filcab/homebrew-core,makigumo/homebrew-core,lemzwerg/homebrew-core,sjackman/homebrew-core,stgraber/homebrew-core,makigumo/homebrew-core,lemzwerg/homebrew-core,nbari/homebrew-core,chrisfinazzo/homebrew-core,zyedidia/homebrew-core,nbari/homebrew-core,Homebrew/homebrew-core,chrisfinazzo/homebrew-core,adam-moss/homebrew-core,Homebrew/homebrew-core