Card: cleanup interface. (PR #1059)

1) Remove Init()
2) Call Reset() via CardManager
3) Call Destroy() via CardManager (only used by Disks/Harddisk) on WM_DESTROY

The only "real" changes are in CSuperSerialCard: ensure destructor cleans up and remove Destroy().

source/CardManager.cpp

@@ -251,3 +251,25 @@ void CardManager::SaveSnapshot(YamlSaveHelper& yamlSaveHelper)
 		}
 	}
 }
+
+void CardManager::Reset(const bool powerCycle)
+{
+	for (UINT i = SLOT0; i < NUM_SLOTS; ++i)
+	{
+		if (m_slot[i])
+		{
+			m_slot[i]->Reset(powerCycle);
+		}
+	}
+}
+
+void CardManager::Destroy()
+{
+	for (UINT i = SLOT0; i < NUM_SLOTS; ++i)
+	{
+		if (m_slot[i])
+		{
+			m_slot[i]->Destroy();
+		}
+	}
+}