remove catch

Author: Baunsgaard

src/main/java/org/apache/sysds/runtime/compress/colgroup/AColGroupValue.java

@@ -195,23 +195,16 @@ public CM_COV_Object centralMoment(CMOperator op, int nRows) {
 
 	@Override
 	public AColGroup rexpandCols(int max, boolean ignore, boolean cast, int nRows) {
-		try {
-			IDictionary d = _dict.rexpandCols(max, ignore, cast, _colIndexes.size());
-			if(d == null) {
-				if(max <= 0)
-					return null;
-				return ColGroupEmpty.create(max);
-			}
-			else {
-				IColIndex outCols = ColIndexFactory.create(d.getNumberOfColumns(_dict.getNumberOfValues(1)));
-				return copyAndSet(outCols, d);
-			}
-		}
-		catch(DMLCompressionException e) {
+		IDictionary d = _dict.rexpandCols(max, ignore, cast, _colIndexes.size());
+		if(d == null) {
 			if(max <= 0)
 				return null;
 			return ColGroupEmpty.create(max);
 		}
+		else {
+			IColIndex outCols = ColIndexFactory.create(d.getNumberOfColumns(_dict.getNumberOfValues(1)));
+			return copyAndSet(outCols, d);
+		}
 	}
 
 	@Override