message: Remove function not used anymore.
diff: namespace verible {
  -static int GetPartitionNodeEnum(const TokenPartitionTree& partition) {
  - const Symbol* origin = partition.Value().Origin();
  - return SymbolCastToNode(*origin).Tag().tag;
  -}
  -
  static int EffectiveCellWidth(const FormatTokenRange& tokens) {
  if (tokens.empty()) return 0;
  VLOG(2) << __FUNCTION__;
  