Revert "chore: garbage collect now, not in 3 days (#153)" (#154)

This reverts commit c0fec69.

registry/garbage-collect.sh

@@ -1,10 +1,7 @@
 #!/bin/sh
 
-echo "Script started"
-
 while true; do
+  sleep 72h # every 3 days
   echo "Starting garbage collection..."
   registry garbage-collect /etc/docker/registry/config.yml || true
-  echo "Garbage collection finished"
-  sleep 72h # every 3 days
 done