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/Networking/Loopback.cpp

@@ -14,11 +14,10 @@ namespace Kernel
 
 		loopback->m_buffer = TRY(VirtualRange::create_to_vaddr_range(
 			PageTable::kernel(),
-			KERNEL_OFFSET,
-			BAN::numeric_limits<vaddr_t>::max(),
+			{ KERNEL_OFFSET, UINTPTR_MAX },
 			buffer_size * buffer_count,
 			PageTable::Flags::ReadWrite | PageTable::Flags::Present,
-			true, false
+			false
 		));
 
 		auto* thread = TRY(Thread::create_kernel([](void* loopback_ptr) {

kernel/kernel/Networking/UDPSocket.cpp

@@ -14,11 +14,10 @@ namespace Kernel
 		auto socket = TRY(BAN::RefPtr<UDPSocket>::create(network_layer, info));
 		socket->m_packet_buffer = TRY(VirtualRange::create_to_vaddr_range(
 			PageTable::kernel(),
-			KERNEL_OFFSET,
-			~(uintptr_t)0,
+			{ KERNEL_OFFSET, UINTPTR_MAX },
 			packet_buffer_size,
 			PageTable::Flags::ReadWrite | PageTable::Flags::Present,
-			true, false
+			false
 		));
 		return socket;
 	}

kernel/kernel/Networking/UNIX/Socket.cpp

@@ -50,11 +50,10 @@ namespace Kernel
 		auto socket = TRY(BAN::RefPtr<UnixDomainSocket>::create(socket_type, info));
 		socket->m_packet_buffer = TRY(VirtualRange::create_to_vaddr_range(
 			PageTable::kernel(),
-			KERNEL_OFFSET,
-			~(uintptr_t)0,
+			{ KERNEL_OFFSET, UINTPTR_MAX },
 			s_packet_buffer_size,
 			PageTable::Flags::ReadWrite | PageTable::Flags::Present,
-			true, false
+			false
 		));
 		return socket;
 	}