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/Frontend/TextDiagnostic.cpp b/clang/lib/Frontend/TextDiagnostic.cpp
index 938fe58..d4e156d 100644
--- a/clang/lib/Frontend/TextDiagnostic.cpp
+++ b/clang/lib/Frontend/TextDiagnostic.cpp
@@ -669,7 +669,7 @@
                                DiagnosticOptions *DiagOpts)
   : DiagnosticRenderer(LangOpts, DiagOpts), OS(OS) {}
 
-TextDiagnostic::~TextDiagnostic() = default;
+TextDiagnostic::~TextDiagnostic() {}
 
 void
 TextDiagnostic::emitDiagnosticMessage(SourceLocation Loc,