Try to use std::aligned_alloc for MacOS

Author: chaeyeunpark

pennylane_lightning/src/util/Memory.hpp

@@ -34,15 +34,7 @@ namespace Pennylane::Util {
  * @return Pointer to the allocated memory
  */
 inline auto alignedAlloc(uint32_t alignment, size_t bytes) -> void * {
-#if defined(__clang__) && defined(__APPLE__)
-    /*
-     * We use `posix_memalign` for MacOS as Mac does not support
-     * `std::aligned_alloc` properly yet (even in MacOS 10.15).
-     */
-    void *p;
-    posix_memalign(&p, alignment, bytes);
-    return p;
-#elif defined(_MSC_VER)
+#if defined(_MSC_VER)
     return _aligned_malloc(bytes, alignment);
 #else
     return std::aligned_alloc(alignment, bytes);
@@ -55,9 +47,7 @@ inline auto alignedAlloc(uint32_t alignment, size_t bytes) -> void * {
  * @param p Pointer to the memory location allocated by aligendAlloc
  */
 inline void alignedFree(void *p) {
-#if defined(__clang__) && defined(__APPLE__)
-    return ::free(p); // NOLINT(hicpp-no-malloc)
-#elif defined(_MSC_VER)
+#if defined(_MSC_VER)
     return _aligned_free(p);
 #else
     return std::free(p);