How do I delete the file "boot.efi"?!?!?!?

Hello, I recently did a re-install of Tiger, and in the install options, I selected "Archive and Install"- so it left a folder on my hard drive called Previous Systems.
I have gone through this folder and taken out everything I want, and I am trying to delete it. It all deletes except for a file called "boot.efi". It stops me when I try to empty the trash by saying "The operation cannot be completed because the item "boot.efi" is locked." and my options are Stop and Continue.
When I click "get info" on the file, the box for "locked" is checked, and is ghosted out, so I cant uncheck it, and I have no options to toggle for file permissions either.
Help me please

boot.efi probably is immutable
- open Terminal window
- man chflags
at bottom: You can use "ls -lo" to see the flags of existing files.
- ls -lo boot.efi
- sudo chflags nouchg boot.efi
- sudo rm boot.efi
Erik

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How do I delete the file "boot.efi"?!?!?!?

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