Delete unused attributes.

* src/core/java/com/dataiku/dip/input/formats/CSVFormatConfig.java,
  src/core/java/com/dataiku/dip/input/formats/SmartRegexpFormatExtractor.java,
  src/core/java/com/dataiku/dip/input/formats/RawRegexpFormatExtractor.java:
  Here.
getter-setters: Moar.

* src/core/java/com/dataiku/dip/input/filter/InputFilter.java,
  src/core/java/com/dataiku/dip/input/formats/CSVFormatConfig.java:
  Here.