Revert of Continue learning for calls in optimized code when we have no type feedback.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index bdcdc22890a8f80a28ef33e7640c1b52db6eb9af..26188a2aea7ae8ad943dfdb89728b9e7db3d22ef 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -968,15 +968,6 @@
 }
 
 
-std::ostream& HCallFunction::PrintDataTo(std::ostream& os) const {  // NOLINT
-  os << NameOf(context()) << " " << NameOf(function());
-  if (HasVectorAndSlot()) {
-    os << " (type-feedback-vector icslot " << slot().ToInt() << ")";
-  }
-  return os;
-}
-
-
 void HBoundsCheck::ApplyIndexChange() {
   if (skip_check()) return;