In its default configuration, Windows 8 will no longer display a Recycle Bin warning to users when they delete a file.
The behavior change is part of a larger series of modifications that sum up to push file management in the upcoming iteration of Windows to the next level.
Users currently get asked whether they’re sure that they want to send a file to the Recycle Bin whenever a file is deleted, with the exception of scenarios when the Shift + Delete key combination is used.
Windows 8 Recycle Bin Warnings Off by Default for Deleted Files - Softpedia