[debugger] remove debugger statement support from FCG/CS.

src/ast/ast.h

Index: src/ast/ast.h
diff --git a/src/ast/ast.h b/src/ast/ast.h
index 7983feb0f5a32d1a7e1bd0a49d23a8a4ec39d7f4..4594c02df97b4482cd49e14791d9808cdb6131fc 100644
--- a/src/ast/ast.h
+++ b/src/ast/ast.h
@@ -1155,26 +1155,10 @@ class TryFinallyStatement final : public TryStatement {
 
 
 class DebuggerStatement final : public Statement {
- public:
-  void set_base_id(int id) { base_id_ = id; }
-  static int num_ids() { return parent_num_ids() + 1; }
-  BailoutId DebugBreakId() const { return BailoutId(local_id(0)); }
-
  private:
   friend class AstNodeFactory;
 
-  explicit DebuggerStatement(int pos)
-      : Statement(pos, kDebuggerStatement),
-        base_id_(BailoutId::None().ToInt()) {}
-
-  static int parent_num_ids() { return 0; }
-  int base_id() const {
-    DCHECK(!BailoutId(base_id_).IsNone());
-    return base_id_;
-  }
-  int local_id(int n) const { return base_id() + parent_num_ids() + n; }
-
-  int base_id_;
+  explicit DebuggerStatement(int pos) : Statement(pos, kDebuggerStatement) {}
 };