Shift-Delete equivalent in OS X [duplicate]
There is no equivalent key combination on OS X. You can delete files only passing through the Trash with the shortcut ⌘⌫ and empty trash using ⌘⇧⌫.
Other solutions involve Automator I guess, but I have no other suggestions about that. All I can say is run such a command on the terminal to batch the process:
rm -rf ~/.Trash/*