[presubmit] Enabling readability/inheritance linter checking.

src/ast.cc

Index: src/ast.cc
diff --git a/src/ast.cc b/src/ast.cc
index ca0a7465b12e61d77d2a9b069da79100d4da18fa..b5c6cf57ea417cf8a70e266ac83bf82e72d31734 100644
--- a/src/ast.cc
+++ b/src/ast.cc
@@ -942,8 +942,7 @@ class RegExpUnparser final : public RegExpVisitor {
  public:
   RegExpUnparser(std::ostream& os, Zone* zone) : os_(os), zone_(zone) {}
   void VisitCharacterRange(CharacterRange that);
-#define MAKE_CASE(Name) \
-  virtual void* Visit##Name(RegExp##Name*, void* data) override;
+#define MAKE_CASE(Name) void* Visit##Name(RegExp##Name*, void* data) override;
   FOR_EACH_REG_EXP_TREE_TYPE(MAKE_CASE)
 #undef MAKE_CASE
  private: