Revert "k3s: fix build reproducibility"

This reverts commit b318b8a30a.

The change introduced by this commit is merged upstream (k3s) and available in
all recent releases.

pkgs/applications/networking/cluster/k3s/builder.nix

@@ -393,10 +393,6 @@ buildGoModule (finalAttrs: {
       --replace-fail '"$LDFLAGS $STATIC" -o' \
                 '"$LDFLAGS" -o'
 
-    # Ensure the embedded tarball is reproducible: sort file order and clamp timestamps
-    substituteInPlace scripts/package-cli \
-      --replace-fail 'tar cvf' 'tar c --sort=name --mtime=@0 -vf'
-
     # Add the -e flag to process "errornous" packages. We need to modify this because the upstream
     # build-time version detection doesn't work with a vendor directory.
     substituteInPlace scripts/version.sh \