Motivation for this change

The package for crashplan 6.6.0 has been removed from its location, breaking the package unless it's upgraded.

Things done

Removed unneeded code from the crashplan for small business service and upgraded the crashplan pkg from 6.6.0 to 6.7.0

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.