Automatic merge from submit-queue
make --include-extended-apis deprecated and remove plumbing
Marks a dead CLI parameter as deprecated and removes the plumbing for it.
The one side effect is that for the "kubectl help" commands a newline
is prepended to output, which will alter the yaml output.
Here we use dedent to format the code to match the output.
hack/update-generated-docs.sh has been run and the affected files have
been added.
Note: for describe.go we added a period to the end of an output message.