message: don't "print xla expression" in trunk annotation.
diff: @@ -96,10 +96,8 @@ void GpuExecutable::ComputeThunkAnnotations() {
  const HloInstruction* hlo = thunk->hlo_instruction();
  CHECK(hlo);
  thunk_annotations_[thunk] =
  - absl::StrFormat("%s:#hlo_op=%s,hlo_module=%s#",
  - hlo->ToStringWithCanonicalNameMap(
  - HloPrintOptions::Canonical(), &canonical_name_map),
  - hlo->name(), hlo->GetModule()->name());
  + absl::StrFormat("Thunk#hlo_op=%s,hlo_module=%s#", hlo->name(),
  + hlo->GetModule()->name());
  }
  }
  