[data.montgomery] Remove split information from core datamodule

src/ptbench/data/montgomery/datamodule.py

@@ -97,12 +97,6 @@ class DataModule(CachingDataModule):
 
     * Database reference: [MONTGOMERY-SHENZHEN-2014]_
     * Original resolution (height x width or width x height): 4020x4892 px or 4892x4020 px
-    * This split:
-
-      * Split reference: None
-      * Training samples: ?? of TB and healthy CXR
-      * Validation samples: ?? of TB and healthy CXR
-      * Test samples: ?? of TB and healthy CXR
 
     Data specifications: