removed habitat suitability test data. see #3795.

habitat_suitability/depth_suitability_categorical.tif

habitat_suitability/file_list.txt

habitat_suitability/file_list_500.txt

habitat_suitability/file_list_categorical.txt

habitat_suitability/hsi.tif

habitat_suitability/hsi_500.tif

habitat_suitability/hsi_categorical.tif

habitat_suitability/hsi_threshold.tif

habitat_suitability/hsi_threshold_500.tif

habitat_suitability/hsi_threshold_categorical.tif

habitat_suitability/hsi_threshold_screened.tif

habitat_suitability/hsi_threshold_screened_500.tif

habitat_suitability/hsi_threshold_screened_categorical.tif