Everywhere: Remove unnecessary AK and Detail namespace scoping

Author: https://github.com/moustafaraafat
Commit: b8f1e1bed2
Pull-request: https://github.com/SerenityOS/serenity/pull/16067
Reviewed-by: https://github.com/AtkinsSJ ✅
Reviewed-by: https://github.com/linusg

AK/HashTable.h

@@ -293,7 +293,7 @@ public:
     {
         if (m_capacity == 0)
             return;
-        if constexpr (!Detail::IsTriviallyDestructible<T>) {
+        if constexpr (!IsTriviallyDestructible<T>) {
             for (auto* bucket : *this)
                 bucket->~T();
         }