Revert "Debugging in kernel shaping up."

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index f62859b23a36944cbf3c2fc5a3906e4aefb7990a..d010ec3da83870ae510fda664ada45e6fbac09b3 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -3557,12 +3557,6 @@ class Script : public Object {
 
   void set_line_starts(const Array& value) const;
 
-  void set_debug_positions(const Array& value) const;
-
-  void set_yield_positions(const Array& value) const;
-
-  RawArray* yield_positions() const { return raw_ptr()->yield_positions_; }
-
   void Tokenize(const String& private_key, bool use_shared_tokens = true) const;
 
   RawLibrary* FindLibrary() const;
@@ -3613,7 +3607,6 @@ class Script : public Object {
   void set_load_timestamp(int64_t value) const;
   void set_tokens(const TokenStream& value) const;
   RawArray* line_starts() const { return raw_ptr()->line_starts_; }
-  RawArray* debug_positions() const { return raw_ptr()->debug_positions_; }
 
   static RawScript* New();