Remove time_interpolator code (This is generic code, but
only user was ia64.  It has been superseded by the
CONFIG_GENERIC_TIME code).
Signed-off-by: NBob Picco <bob.picco@hp.com>
Signed-off-by: NJohn Stultz <johnstul@us.ibm.com>
Signed-off-by: NPeter Keilty <peter.keilty@hp.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>