Remove aligned_alloc from libc allocator since it's not implemented on Windows

tests/allocator/test_allocator.c

@@ -9,7 +9,7 @@
 TestFuncResult test_libc_allocator(void) {
   Allocator allocator = wapp_mem_libc_allocator();
   bool result         = allocator.obj == NULL && allocator.alloc != NULL &&
-                        allocator.alloc_aligned != NULL && allocator.realloc != NULL &&
+                        allocator.alloc_aligned == NULL && allocator.realloc != NULL &&
                         allocator.realloc_aligned == NULL && allocator.free != NULL;
   void *ptr           = wapp_mem_allocator_alloc(&allocator, 20);
   result              = result && (ptr != NULL);