Kernel: Replace includes with a forward declaration

Author: https://github.com/jamesmintram
Commit: 580006d784
Pull-request: https://github.com/SerenityOS/serenity/pull/10453
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/linusg ✅

Kernel/Arch/x86/TrapFrame.h

@@ -8,12 +8,10 @@
 
 #include <AK/Types.h>
 
-#include <Kernel/Arch/x86/InterruptDisabler.h>
-#include <Kernel/Arch/x86/Processor.h>
-#include <Kernel/Arch/x86/RegisterState.h>
-
 namespace Kernel {
 
+struct RegisterState;
+
 struct TrapFrame {
     FlatPtr prev_irq_level;
     TrapFrame* next_trap;