message: [TF2XLA] [NFC] Remove a reference to a non-existent symbol
diff: @@ -217,10 +217,9 @@ bool IndicesToCopyForConditional(const HloDataflowAnalysis& dataflow,
  // Add kCopy instructions around the given kWhile instruction to eliminate any
  // possible live range interference of HLO values assuming a dependency-based
  -// ordering (HloDependencyOrdering). Copies are added conservatively. There
  -// likely are copies which are not strictly necessary, but they are removed
  -// later in the pass via RemoveUnnecessaryCopies.
  -//
  +// ordering. Copies are added conservatively. There likely are copies which are
  +// not strictly necessary, but they are removed later in the pass via
  +// RemoveUnnecessaryCopies.
  //
  // Elements (each ShapeIndex) in the loop state are considered independently. A
  // copy is added to each element of the loop state which is modified in the
  