Fix package removal

Shift first to drop the first commandline argument (-e).

Change-Id: I73a0100484b6443ad5bdf500dd032af20eac7d3b
Replacing deploy to deploy-baremetal in README.md

Now that deploy has been renamed to deploy-baremetal, README.md needs
to be updated to refer to the new elements.

Change-Id: I7c0d5bfe158628ea1faf2c2914ee7f532d172a28
fail at startup with no operating-system element

Raise an error if there is no element with “operating-system”
in the element-provides file.

Change-Id: I2242537abc4c610252984c32c286bc6eb25de672
Merge "fail at startup with no operating-system element"
Merge "Replacing deploy to deploy-baremetal in README.md"
Merge "Fix package removal"