Do a sweep over move ctors and remove those that are identical to the default.

All of these existed because MSVC 2013 was unable to synthesize default
move ctors. We recently dropped support for it so all that error-prone
boilerplate can go.

No functionality change intended.

llvm-svn: 284721
diff --git a/llvm/lib/ExecutionEngine/Interpreter/Interpreter.h b/llvm/lib/ExecutionEngine/Interpreter/Interpreter.h
index 2e5a867..5c16448 100644
--- a/llvm/lib/ExecutionEngine/Interpreter/Interpreter.h
+++ b/llvm/lib/ExecutionEngine/Interpreter/Interpreter.h
@@ -41,12 +41,9 @@
 public:
   AllocaHolder() {}
 
-  // Make this type move-only. Define explicit move special members for MSVC.
-  AllocaHolder(AllocaHolder &&RHS) : Allocations(std::move(RHS.Allocations)) {}
-  AllocaHolder &operator=(AllocaHolder &&RHS) {
-    Allocations = std::move(RHS.Allocations);
-    return *this;
-  }
+  // Make this type move-only.
+  AllocaHolder(AllocaHolder &&) = default;
+  AllocaHolder &operator=(AllocaHolder &&RHS) = default;
 
   ~AllocaHolder() {
     for (void *Allocation : Allocations)
@@ -72,22 +69,6 @@
   AllocaHolder Allocas;            // Track memory allocated by alloca
 
   ExecutionContext() : CurFunction(nullptr), CurBB(nullptr), CurInst(nullptr) {}
-
-  ExecutionContext(ExecutionContext &&O)
-      : CurFunction(O.CurFunction), CurBB(O.CurBB), CurInst(O.CurInst),
-        Caller(O.Caller), Values(std::move(O.Values)),
-        VarArgs(std::move(O.VarArgs)), Allocas(std::move(O.Allocas)) {}
-
-  ExecutionContext &operator=(ExecutionContext &&O) {
-    CurFunction = O.CurFunction;
-    CurBB = O.CurBB;
-    CurInst = O.CurInst;
-    Caller = O.Caller;
-    Values = std::move(O.Values);
-    VarArgs = std::move(O.VarArgs);
-    Allocas = std::move(O.Allocas);
-    return *this;
-  }
 };
 
 // Interpreter - This class represents the entirety of the interpreter.