kernel/handle_table: Default destructor in the cpp file

We don't need to potentially inline the teardown logic of all of the
handle instances.

src/core/hle/kernel/handle_table.cpp

@@ -17,6 +17,8 @@ HandleTable::HandleTable(KernelSystem& kernel) : kernel(kernel) {
     Clear();
 }
 
+HandleTable::~HandleTable() = default;
+
 ResultVal<Handle> HandleTable::Create(SharedPtr<Object> obj) {
     DEBUG_ASSERT(obj != nullptr);