Kernel: Remove global system accessor from WaitObject

src/core/hle/kernel/kernel.h

@@ -82,6 +82,12 @@ public:
     /// Gets the sole instance of the global scheduler
     const Kernel::GlobalScheduler& GlobalScheduler() const;
 
+    /// Gets the sole instance of the system
+    Core::System& System();
+
+    /// Gets the sole instance of the system
+    const Core::System& System() const;
+
     /// Adds a port to the named port table
     void AddNamedPort(std::string name, SharedPtr<ClientPort> port);