revert henke's loadingwindow "improvements"; if you're reading this, henke, you do *NOT* sacrifice readability for misguided optimization, and you do *NOT* use a globally externed variable for something with a useful lifetime of part of one function

src/ThemeManager.cpp

@@ -8,7 +8,6 @@
 #include "RageTimer.h"
 #include "FontCharAliases.h"
 #include "arch/ArchHooks/ArchHooks.h"
-#include "arch/LoadingWindow/LoadingWindow.h"
 #include "arch/Dialog/Dialog.h"
 #include "RageFile.h"
 #if !defined(SMPACKAGE)
@@ -398,8 +397,6 @@ void ThemeManager::SwitchThemeAndLanguage( const RString &sThemeName_, const RSt
 	if( bNothingChanging && !bForceThemeReload )
 		return;
 
-	if(pLoadingWindow) pLoadingWindow->SetText("Loading theme & language...");
-
 	m_bPseudoLocalize = bPseudoLocalize;
 
 	// Load theme metrics. If only the language is changing, this is all