Revert "ANDROID: hardlockup: detect hard lockups without NMIs using secondary cpus"

This reverts commit aaf78ec6.

We need to do this to handle a merge conflict with 4.9.32.  It will be
forward ported after the merge is complete.

Cc: Brian Norris <briannorris@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>