xf86_input_wacom: 0.36.0 -> 0.40.0, cleanup

[moni-dz]

Motivation for this change

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• 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 nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[r-rmcgibbo]

Result of nixpkgs-review pr 123755 at 6794bb2 run on x86_64-linux 1

5 packages skipped due to time constraints:

• cinnamon.cinnamon-common
• cinnamon.cinnamon-control-center
• cinnamon.cinnamon-gsettings-overrides
• cinnamon.cinnamon-screensaver
• wacomtablet

4 packages built successfully:

• cinnamon.cinnamon-session
• cinnamon.cinnamon-settings-daemon
• tests.trivial
• xf86_input_wacom