Removing 2.8b model while waiting data

A couple of files were not correctly uploaded initially

pythia-training-metrics.py

@@ -12,7 +12,7 @@ class PythiaTrainingMetrics(datasets.GeneratorBasedBuilder):
         "160m", 
         #"410m",
         "1.4b",
-        "2.8b",
+        #"2.8b",
     ]
 
     _GRADIENTS_DESCRIPTION = """\