Remove sync script as it is too complicated to maintain across all OSes.

subjects/update-vm/sync.sh

@@ -1,38 +0,0 @@
-#!/usr/bin/env bash
-
-set -euo pipefail
-IFS='
-'
-
-if ! test -d "$HOME/VirtualBox VMs"; then
-    echo "Is VirtualBox installed ? Could not find $HOME/VirtualBox VMs"
-    exit 1
-fi
-
-if pgrep VirtualBox >/dev/null; then
-    echo Close VirtualBox before updating debian-01 Virtual Machine
-    exit 1
-fi
-
-key_file=$(mktemp)
-
-cat <<'EOF'> "$key_file"
------BEGIN OPENSSH PRIVATE KEY-----
-b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
-QyNTUxOQAAACAeqfcTKSukPU9D1pmO2v7EeaTefBMlr84RAKfjR3xlwgAAAJDSLNAv0izQ
-LwAAAAtzc2gtZWQyNTUxOQAAACAeqfcTKSukPU9D1pmO2v7EeaTefBMlr84RAKfjR3xlwg
-AAAEB8CYX9ExfuZx3Uw7otY3CIa2G+5K71Zu3iPn/97LXInB6p9xMpK6Q9T0PWmY7a/sR5
-pN58EyWvzhEAp+NHfGXCAAAADWFzc2V0c0BzZXJ2ZXI=
------END OPENSSH PRIVATE KEY-----
-EOF
-
-rsync \
-    --archive \
-    --delete \
-    --compress \
-    --compress-choice lz4 \
-    --info=progress2 \
-    --rsh="ssh -oIdentitiesOnly=yes -p521 -i$key_file" \
-    assets@assets.01-edu.org:debian-01 "$HOME/VirtualBox VMs"
-
-echo "debian-01 successfully updated"