Remove move constructors that are identical to the generated default move ctor.

llvm-svn: 284856
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index c5e7598..338f006 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -7199,9 +7199,7 @@
     enum { AnyExprKind, BinOpKind, BinOpVisitedLHSKind } Kind;
 
     Job() = default;
-    Job(Job &&J)
-        : E(J.E), LHSResult(J.LHSResult), Kind(J.Kind),
-          SpecEvalRAII(std::move(J.SpecEvalRAII)) {}
+    Job(Job &&) = default;
 
     void startSpeculativeEval(EvalInfo &Info) {
       SpecEvalRAII = SpeculativeEvaluationRAII(Info);