Function delete_variable 

pub fn delete_variable(name: &CStr16, vendor: &VariableVendor) -> Result

Deletes a UEFI variable.

Errors

• Status::INVALID_PARAMETER: invalid name or vendor.
• Status::WRITE_PROTECTED: variable is read-only.
• Status::SECURITY_VIOLATION: variable could not be deleted due to an authentication error.
• Status::NOT_FOUND: attempted to delete a non-existent variable.
• Status::UNSUPPORTED: this platform does not support variable storage after exiting boot services.