Revert "ubuntu.sh: install packer for temporary"

This reverts commit fed5ed58078249d38ff3c4d53d2e055c0ab22ee3.

Reason for revert:
The AMI for staging "Test Jenkins AMI" build node has been built, no need packer any more

Change-Id: Id2856934dd9aa7761c126e4ec033b8412ec9c4a1
1 file changed
tree: a280aaa2dbf989653c42e1e49302e4455d33e226
  1. freebsd.sh
  2. packer_freebsd.json
  3. packer_ubuntu.json
  4. ubuntu.sh