Remove mention-bot config as not used (#1716)
Remove mention-bot config as not used (#1716)


QingChenmsft/azure-cli,yugangw-msft/azure-cli,QingChenmsft/azure-cli,samedder/azure-cli,yugangw-msft/azure-cli,yugangw-msft/azure-cli,yugangw-msft/azure-cli,yugangw-msft/azure-cli,yugangw-msft/azure-cli,samedder/azure-cli,QingChenmsft/azure-cli,samedder/azure-cli,QingChenmsft/azure-cli,samedder/azure-cli