Revert "Update VecAddMoveOnlyFunctor and VecAddWithIsSupportedMethod …

…with Default constructor (microsoft#17705)"

This reverts commit fc9a69d.

This is a prerequisite to reverting
0141e27, which is the revision
that I actually want to revert.

onnxruntime/test/framework/tunable_op_test.cc

@@ -263,7 +263,8 @@ TEST(TunableOp, OpWrapsMutableFunctor) {
 
 class VecAddMoveOnlyFunctor {
  public:
-  VecAddMoveOnlyFunctor() = default;
+  VecAddMoveOnlyFunctor() {
+  }
   VecAddMoveOnlyFunctor(VecAddMoveOnlyFunctor&&) = default;
   ORT_DISALLOW_COPY_AND_ASSIGNMENT(VecAddMoveOnlyFunctor);
 
@@ -289,7 +290,8 @@ TEST(TunableOp, OpWrapsMoveOnlyFunctor) {
 
 class VecAddWithIsSupportedMethod {
  public:
-  VecAddWithIsSupportedMethod() = default;
+  VecAddWithIsSupportedMethod() {
+  }
   VecAddWithIsSupportedMethod(VecAddWithIsSupportedMethod&&) = default;
   ORT_DISALLOW_COPY_AND_ASSIGNMENT(VecAddWithIsSupportedMethod);