Remove clamp macro

Doesn't really need to exist since  all it's doing is inlining std::clamp.

src/NotesLoaderSM.cpp

@@ -856,7 +856,7 @@ void SMLoader::ProcessTickcounts( TimingData &out, const RString line, const int
 		}
 
 		const float fTickcountBeat = RowToBeat( arrayTickcountValues[0], rowsPerBeat );
-		int iTicks = clamp(atoi( arrayTickcountValues[1] ), 0, ROWS_PER_BEAT);
+		int iTicks = std::clamp(atoi( arrayTickcountValues[1] ), 0, ROWS_PER_BEAT);
 
 		out.AddSegment( TickcountSegment(BeatToNoteRow(fTickcountBeat), iTicks) );
 	}