Kernel: Remove unnused features from VirtualRange

On-demand paging has not been used ever since I made userspace stack be
a normal MemoryRegion.

kernel/kernel/Terminal/PseudoTerminal.cpp

@@ -42,10 +42,10 @@ namespace Kernel
 
 		auto pts_master_buffer = TRY(VirtualRange::create_to_vaddr_range(
 			PageTable::kernel(),
-			KERNEL_OFFSET, static_cast<vaddr_t>(-1),
+			{ KERNEL_OFFSET, UINTPTR_MAX },
 			16 * PAGE_SIZE,
 			PageTable::Flags::ReadWrite | PageTable::Flags::Present,
-			true, false
+			false
 		));
 		auto pts_master = TRY(BAN::RefPtr<PseudoTerminalMaster>::create(BAN::move(pts_master_buffer), mode, uid, gid));
 		DevFileSystem::get().remove_from_cache(pts_master);