Removed unused files/scripts

Delete osquery.flags

Delete osquery.conf

Delete wef_inputs.conf

Delete splunk-add-on-for-microsoft-windows_500.tgz

Delete inputs.conf

Delete transforms.conf

Delete props.conf

Delete add-on-for-microsoft-sysmon_800.tgz

Delete microsoft-ata-config.json

Delete server.key

Delete server.crt

Delete mongod.service

Delete caldera.service

Delete join-domain.ps1