kern: improve KSynchronizationObject, kill KSynchronization

libraries/libmesosphere/include/mesosphere/kern_kernel.hpp

@@ -37,7 +37,6 @@ namespace ams::kern {
     class KPageTableManager;
     class KMemoryBlockSlabManager;
     class KBlockInfoManager;
-    class KSynchronization;
     class KUnsafeMemory;
 
 #if defined(ATMOSPHERE_ARCH_ARM64)
@@ -73,7 +72,6 @@ namespace ams::kern {
             static KMemoryBlockSlabManager s_sys_memory_block_manager;
             static KBlockInfoManager s_block_info_manager;
             static KSupervisorPageTable s_supervisor_page_table;
-            static KSynchronization s_synchronization;
             static KUnsafeMemory s_unsafe_memory;
             static KWorkerTaskManager s_worker_task_managers[KWorkerTaskManager::WorkerType_Count];
             static KInterruptManager s_interrupt_manager;
@@ -144,10 +142,6 @@ namespace ams::kern {
                 return s_supervisor_page_table;
             }
 
-            static ALWAYS_INLINE KSynchronization &GetSynchronization() {
-                return s_synchronization;
-            }
-
             static ALWAYS_INLINE KUnsafeMemory &GetUnsafeMemory() {
                 return s_unsafe_memory;
             }