Build: Remove -fno-sized-deallocation -Wno-sized-deallocation

Add sized variants of the global operator delete functions so we don't
have to use these GCC options anymore.

Kernel/Heap/kmalloc.cpp

@@ -239,22 +239,3 @@ void* operator new[](size_t size)
     return kmalloc(size);
 }
 
-void operator delete(void* ptr)
-{
-    return kfree(ptr);
-}
-
-void operator delete[](void* ptr)
-{
-    return kfree(ptr);
-}
-
-void operator delete(void* ptr, size_t)
-{
-    return kfree(ptr);
-}
-
-void operator delete[](void* ptr, size_t)
-{
-    return kfree(ptr);
-}