Fix documentation of Clamp; it does not take a computation at all.
Fix documentation of Clamp; it does not take a computation at all.

See:
https://github.com/tensorflow/tensorflow/blob/r1.6/tensorflow/compiler/xla/client/computation_builder.h#L668
PiperOrigin-RevId: 190671530

tensorflow/docs,tensorflow/docs,tensorflow/docs-l10n,tensorflow/docs