Remove print statements used for debugging tests

Author: patrick-austin

src/main/java/org/icatproject/lucene/Lucene.java

@@ -1678,9 +1678,6 @@ private void convertValue(Document document, JsonObject json, String unitString,
 			// If we aren't dealing with the desired numeric field don't convert
 			return;
 		}
-		System.out.println(numericalValue);
-		System.out.println(unitString);
-		System.out.println(icatUnits);
 		logger.trace("Attempting to convert {} {}", numericalValue, unitString);
 		Value value = icatUnits.convertValueToSiUnits(numericalValue, unitString);
 		if (value != null) {