Revert "Apply modernize-use-default to clang-tools-extra."

Breaks the build in GCC 4.7.2 (see
http://lab.llvm.org:8011/builders/perf-x86_64-penryn-O3 for example)

This reverts commit r250824.

llvm-svn: 250862
diff --git a/clang-tools-extra/clang-query/Query.cpp b/clang-tools-extra/clang-query/Query.cpp
index 594c742..74eb6ea 100644
--- a/clang-tools-extra/clang-query/Query.cpp
+++ b/clang-tools-extra/clang-query/Query.cpp
@@ -20,7 +20,7 @@
 namespace clang {
 namespace query {
 
-Query::~Query() = default;
+Query::~Query() {}
 
 bool InvalidQuery::run(llvm::raw_ostream &OS, QuerySession &QS) const {
   OS << ErrStr << "\n";