Make default constructor private

Author: lbushi25

sycl/include/sycl/ext/oneapi/experimental/work_group_memory.hpp

@@ -49,16 +49,14 @@ class __SYCL_SPECIAL_CLASS __SYCL_TYPE(work_group_memory) work_group_memory
   using decoratedPtr = typename sycl::detail::DecoratedType<
       value_type, access::address_space::local_space>::type *;
 
-// Frontend requires special types to have a default constructor in device
-// compilation mode in order to have a uniform way of initializing an object of
-// special type to then call the __init method on it. This is purely an
-// implementation detail and not part of the spec.
-#ifdef __SYCL_DEVICE_ONLY__
+  // Frontend requires special types to have a default constructor in order to
+  // have a uniform way of initializing an object of special type to then call
+  // the __init method on it. This is purely an implementation detail and not
+  // part of the spec.
   work_group_memory() = default;
-#endif
 
 public:
-  work_group_memory(const indeterminate_t &) {};
+  work_group_memory(const indeterminate_t &){};
   work_group_memory(const work_group_memory &rhs) = default;
   work_group_memory &operator=(const work_group_memory &rhs) = default;
   template <typename T = DataT,