Kernel: Remove unnecessary includes from Thread.h

...and deal with the fallout by adding missing includes everywhere.

Kernel/Syscalls/alarm.cpp

@@ -6,6 +6,7 @@
 
 #include <Kernel/Process.h>
 #include <Kernel/Time/TimeManagement.h>
+#include <Kernel/TimerQueue.h>
 
 namespace Kernel {
 

Kernel/Syscalls/execve.cpp

@@ -19,6 +19,7 @@
 #include <Kernel/PerformanceManager.h>
 #include <Kernel/Process.h>
 #include <Kernel/Random.h>
+#include <Kernel/Scheduler.h>
 #include <Kernel/Time/TimeManagement.h>
 #include <LibC/limits.h>
 #include <LibELF/AuxiliaryVector.h>

Kernel/Syscalls/fork.cpp

@@ -6,10 +6,10 @@
 
 #include <Kernel/Debug.h>
 #include <Kernel/FileSystem/Custody.h>
-#include <Kernel/FileSystem/OpenFileDescription.h>
 #include <Kernel/Memory/Region.h>
 #include <Kernel/PerformanceManager.h>
 #include <Kernel/Process.h>
+#include <Kernel/Scheduler.h>
 
 namespace Kernel {
 

Kernel/Syscalls/mmap.cpp

@@ -7,6 +7,7 @@
 
 #include <Kernel/Arch/SmapDisabler.h>
 #include <Kernel/Arch/x86/MSR.h>
+#include <Kernel/Arch/x86/SafeMem.h>
 #include <Kernel/FileSystem/OpenFileDescription.h>
 #include <Kernel/Memory/AnonymousVMObject.h>
 #include <Kernel/Memory/MemoryManager.h>

Kernel/Syscalls/profiling.cpp

@@ -5,9 +5,9 @@
  */
 
 #include <Kernel/Coredump.h>
-#include <Kernel/FileSystem/VirtualFileSystem.h>
 #include <Kernel/PerformanceManager.h>
 #include <Kernel/Process.h>
+#include <Kernel/Scheduler.h>
 #include <Kernel/Time/TimeManagement.h>
 
 namespace Kernel {

Kernel/Syscalls/ptrace.cpp

@@ -6,12 +6,12 @@
  */
 
 #include <AK/ScopeGuard.h>
-#include <Kernel/Memory/MemoryManager.h>
 #include <Kernel/Memory/PrivateInodeVMObject.h>
 #include <Kernel/Memory/Region.h>
 #include <Kernel/Memory/ScopedAddressSpaceSwitcher.h>
 #include <Kernel/Memory/SharedInodeVMObject.h>
 #include <Kernel/Process.h>
+#include <Kernel/Scheduler.h>
 #include <Kernel/ThreadTracer.h>
 
 namespace Kernel {

Kernel/Syscalls/sched.cpp

@@ -5,6 +5,7 @@
  */
 
 #include <Kernel/Process.h>
+#include <Kernel/Scheduler.h>
 
 namespace Kernel {
 

Kernel/Syscalls/thread.cpp

@@ -8,6 +8,7 @@
 #include <Kernel/Memory/MemoryManager.h>
 #include <Kernel/PerformanceManager.h>
 #include <Kernel/Process.h>
+#include <Kernel/Scheduler.h>
 
 namespace Kernel {