Kernel/TmpFS: Remove some unnecessary includes

Kernel/FileSystem/TmpFS.cpp

@@ -6,7 +6,6 @@
 
 #include <Kernel/FileSystem/TmpFS.h>
 #include <Kernel/Process.h>
-#include <Kernel/Thread.h>
 #include <LibC/limits.h>
 
 namespace Kernel {

Kernel/FileSystem/TmpFS.h

@@ -6,8 +6,6 @@
 
 #pragma once
 
-#include <AK/HashMap.h>
-#include <AK/Optional.h>
 #include <Kernel/FileSystem/FileSystem.h>
 #include <Kernel/FileSystem/Inode.h>
 #include <Kernel/KBuffer.h>