Revert "Merge of source position information from kernel-sdk."

runtime/vm/raw_object.h

Index: runtime/vm/raw_object.h
diff --git a/runtime/vm/raw_object.h b/runtime/vm/raw_object.h
index 9097b1d65012b029470e6b3667bfb7efeb2338ad..94c98224ebe053d2c6ed35030bd84afe174050f5 100644
--- a/runtime/vm/raw_object.h
+++ b/runtime/vm/raw_object.h
@@ -970,7 +970,6 @@ class RawScript : public RawObject {
     kSourceTag,
     kPatchTag,
     kEvaluateTag,
-    kKernelTag,
   };
 
  private:
@@ -980,7 +979,6 @@ class RawScript : public RawObject {
   RawString* url_;
   RawString* resolved_url_;
   RawArray* compile_time_constants_;
-  RawArray* line_starts_;
   RawTokenStream* tokens_;
   RawString* source_;
   RawObject** to() { return reinterpret_cast<RawObject**>(&ptr()->source_); }