Roll-back r250822.

Summary: It breaks the build for the ASTMatchers

Subscribers: klimek, cfe-commits

Differential Revision: http://reviews.llvm.org/D13893

llvm-svn: 250827
diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 1d027d5..588ae3d 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -9567,8 +9567,8 @@
   }
 
 public:
-  ExprBuilder() = default;
-  virtual ~ExprBuilder() = default;
+  ExprBuilder() {}
+  virtual ~ExprBuilder() {}
 
   virtual Expr *build(Sema &S, SourceLocation Loc) const = 0;
 };