Remove obsolete loose images/segmentations/metadata/splits (flattened into data/train parquet)

LICENSE

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-Creative Commons Attribution 4.0 International (CC BY 4.0)
-See https://creativecommons.org/licenses/by/4.0/

cystods_dictionary.csv

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-Variable,Type,Description,Choices
-filename,string,de-identified image file name,8 alphanumeric characters followed by file extension
-pid,integer,random subject identification,3 to 4 digit integer
-visit,integer,sequential visit number,integer from 1 to 7
-lesion,string,lesion number and view identification | multifocal if enumeration not possible or multiple lesions sent to pathology as one specimen,LX-X | Multifocal
-mulitfocal,string,categorization of rough enumerization of multifocal lesions,2 to 7 | 8+
-bca,string,is bladder cancer present?,Yes | No
-class,string,one of five class labels,Malignant | Non-malignant | Anatomical | Foreign | Normal Mucosa
-subclass,string,one of twenty-two subclass labels,LowGradePapillary | HighGradePapillary | CIS | PreMalignant | BenignNOS | InflammationNOS | CCG | Denuded | UrothelialPapilloma | SquamousMetaplasia | BenignRare | NephrogenicAdenoma | UreteralOrifice| ResectionBed | ResectionScar | Trabeculation | ProstaticUrethra | Diverticulum | AirBubble | ResectionLoop | BiopsyForcep | Stent
-subclass2,string,additional subclass label for lesions that contain multiple subclasses,CIS | HighGradePapillary
-stage,string,bladder cancer stage,Ta | T1 | T2 | Tis
-morphology,string,physical appearance of lesion,Papillary | Non-papillary
-modality,string,type of visualization modality used,WLC | BLC
-json,boolean,segmentation available?,1 | 0