remove trailing commas that break json formatting

fixes json document formatting to allow parsing by validators

config.json

@@ -84,7 +84,7 @@
     "intermediate_size": 3072,
     "num_attention_heads": 12,
     "num_hidden_layers": 12,
-    "projection_dim": 768,
+    "projection_dim": 768
   },
   "torch_dtype": "float32",
   "transformers_version": null,
@@ -166,6 +166,6 @@
     "num_attention_heads": 16,
     "num_hidden_layers": 24,
     "patch_size": 14,
-    "projection_dim": 768,
+    "projection_dim": 768
   }
 }