remove overrides/customizations as they are handled upstream in Malcolm

[mmguero]

See cisagov/Malcolm#642. As those changes are made to accommodate the customizations/overrides in this helm chart that supersede the defaults for various malcolm files, those customizations/overrides can be removed.

[supcom234]

Areas where we are overriding.

1. https://github.com/idaholab/Malcolm-Helm/blob/main/chart/templates/logstash_override.yml
2. https://github.com/idaholab/Malcolm-Helm/blob/main/chart/templates/arkime-ini.yml

3. Malcolm-Helm/chart/templates/_helpers.tpl

   Line 190 in bae96ed

   {{- define "malcolm.ecstemplate" }}

4. Malcolm-Helm/chart/templates/18-netbox.yml

   Line 139 in 5f053ff

   ####