remove another specialized "parse and evaluate string"

stepmania/src/LuaManager.cpp

@@ -523,17 +523,6 @@ bool LuaHelpers::RunExpression( Lua *L, const RString &sExpression, const RStrin
 	return true;
 }
 
-void LuaHelpers::RunExpressionS( const RString &str, RString &sOut )
-{
-	Lua *L = LUA->Get();
-
-	RunExpression( L, str );
-
-	LuaHelpers::Pop( L, sOut );
-
-	LUA->Release( L );
-}
-
 void LuaHelpers::ParseCommandList( Lua *L, const RString &sCommands, const RString &sName )
 {
 	RString sLuaFunction;

stepmania/src/LuaManager.h

@@ -72,9 +72,6 @@ namespace LuaHelpers
 	/* Read the table at the top of the stack back into a vector. */
 	void ReadArrayFromTableB( Lua *L, vector<bool> &aOut );
 
-	/* Run an expression in the global environment, returning the given type. */
-	void RunExpressionS( const RString &str, RString &sOut );
-
 	void ParseCommandList( lua_State *L, const RString &sCommands, const RString &sName );
 
 	XNode *GetLuaInformation();

stepmania/src/ThemeManager.cpp

@@ -827,8 +827,12 @@ RString ThemeManager::GetClassFallback( const RString &sClassName )
 	if( !GetMetricRawRecursive(g_pLoadedThemeData->iniMetrics,sClassName,"Fallback",sFallback) )
 		return RString();
 
+	Lua *L = LUA->Get();
+	LuaHelpers::RunExpression( L, sFallback );
 	RString sRet;
-	LuaHelpers::RunExpressionS( sFallback, sRet );
+	LuaHelpers::Pop( L, sRet );
+	LUA->Release( L );
+
 	return sRet;
 }