Revert "Merge branch 'setuid-wrapper-readlink'"
Revert "Merge branch 'setuid-wrapper-readlink'"

Kernel symlinks don't have st_size. Really thought I tested this, guess I ran the
wrong NixOS test :(

This reverts commit 6dab907ebe9c8015b8cbc4871313ed48c64c548c, reversing
changes made to eab479a5f0e46ad461ebda9953477be8f1e5e2bb.

SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs,SymbiFlow/nixpkgs,SymbiFlow/nixpkgs,NixOS/nixpkgs