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/MultiplexConsumer.cpp b/clang/lib/Frontend/MultiplexConsumer.cpp
index 226e33d..91ee100 100644
--- a/clang/lib/Frontend/MultiplexConsumer.cpp
+++ b/clang/lib/Frontend/MultiplexConsumer.cpp
@@ -262,7 +262,7 @@
   }
 }
 
-MultiplexConsumer::~MultiplexConsumer() = default;
+MultiplexConsumer::~MultiplexConsumer() {}
 
 void MultiplexConsumer::Initialize(ASTContext &Context) {
   for (auto &Consumer : Consumers)