Disable DATA.N_CLASSES and TEST.BY_CHUNKS restriction

Author: danifranco

biapy/engine/check_configuration.py

@@ -2139,8 +2139,6 @@ def sort_key(item):
                 ], "'TEST.BY_CHUNKS.WORKFLOW_PROCESS.TYPE' needs to be in ['chunk_by_chunk', 'entire_pred']"
             if len(cfg.DATA.TEST.INPUT_IMG_AXES_ORDER) < 3:
                 raise ValueError("'DATA.TEST.INPUT_IMG_AXES_ORDER' needs to be at least of length 3, e.g., 'ZYX'")
-            if cfg.DATA.N_CLASSES > 2:
-                raise ValueError("Not implemented pipeline option: 'DATA.N_CLASSES' > 2 and 'TEST.BY_CHUNKS'")
             if cfg.DATA.TEST.INPUT_ZARR_MULTIPLE_DATA:
                 if cfg.DATA.TEST.INPUT_ZARR_MULTIPLE_DATA_RAW_PATH == "":
                     raise ValueError(