IOS: Don't expose HLE::Reset()

This is an implementation detail that does not have to be exposed.

It was used in WII_IPC whenever the IPC gets reset, but that does not
make much sense to me: the only time when IOS loses state and the IPC
registers are set up again is when it's reloaded. And reloading IOS
already calls Reset() indirectly.

Also, an IPC reset from the PPC definitely should not close all opened
devices!

This also gets rid of a special case for clear_devices, which is now
completely unneeded.

Source/Core/Core/HW/WII_IPC.cpp

@@ -139,7 +139,6 @@ void Reset()
 {
   INFO_LOG(WII_IPC, "Resetting ...");
   InitState();
-  HLE::Reset();
 }
 
 void Shutdown()

Source/Core/Core/IOS/IPC.cpp

@@ -631,7 +631,7 @@ void Init()
   SetupMemory(IOS80_TITLE_ID, MemorySetupType::Full);
 }
 
-void Reset(const bool clear_devices)
+static void Reset()
 {
   CoreTiming::RemoveAllEvents(s_event_enqueue);
 
@@ -644,7 +644,6 @@ void Reset(const bool clear_devices)
     device.reset();
   }
 
-  if (clear_devices)
   {
     std::lock_guard<std::mutex> lock(s_device_map_mutex);
     s_device_map.clear();
@@ -658,7 +657,7 @@ void Reset(const bool clear_devices)
 
 void Shutdown()
 {
-  Reset(true);
+  Reset();
 }
 
 constexpr u64 BC_TITLE_ID = 0x0000000100000100;
@@ -687,7 +686,7 @@ bool Reload(const u64 ios_title_id)
     return false;
 
   s_active_title_id = ios_title_id;
-  Reset(true);
+  Reset();
 
   if (ios_title_id == MIOS_TITLE_ID)
   {

Source/Core/Core/IOS/IPC.h

@@ -52,8 +52,6 @@ enum IPCCommandType : u32
 
 // Init events and devices
 void Init();
-// Reset all events and devices (and optionally clear them)
-void Reset(bool clear_devices = false);
 // Shutdown
 void Shutdown();