How long must we support this "hack"?

src/NotesLoaderSM.cpp

@@ -667,6 +667,19 @@ bool SMLoader::LoadNoteDataFromSimfile( const RString &path, Steps &out )
 				difficulty = "Challenge";
 			}
 			
+			/* Handle hacks that originated back when StepMania didn't have
+			 * Difficulty_Challenge. TODO: Remove the need for said hacks. */
+			if( difficulty.CompareNoCase("hard") == 0 )
+			{
+				/* HACK: Both SMANIAC and CHALLENGE used to be Difficulty_Hard.
+				 * They were differentiated via aspecial description.
+				 * Account for the rogue charts that do this. */
+				// HACK: SMANIAC used to be Difficulty_Hard with a special description.
+				if (description.CompareNoCase("smaniac") == 0 ||
+					description.CompareNoCase("challenge") == 0) 
+					difficulty = "Challenge";
+			}
+			
 			if(!(out.m_StepsType == GAMEMAN->StringToStepsType( stepsType ) &&
 			     out.GetDescription() == description &&
 			     (out.GetDifficulty() == StringToDifficulty(difficulty) ||