removed extra keys from config

lens/gpt2-large/config.json

@@ -1 +1,7 @@
-{"dropout": 0.0, "identity_init": true, "include_input": true, "layer_norm": false, "mlp_hidden_sizes": [], "rank": null, "shared_mlp_hidden_sizes": [], "share_weights": false, "sublayers": false, "num_layers": 36, "vocab_size": 50257, "bias": true, "d_model": 1280}
+{
+    "include_input": true,
+    "num_layers": 36,
+    "vocab_size": 50257,
+    "bias": true,
+    "d_model": 1280
+}

lens/gpt2-xl/config.json

@@ -1 +1,7 @@
-{"bias": true, "identity_init": true, "include_input": true, "include_final": false, "orthogonal": false, "rank": null, "sublayers": false, "d_model": 1600, "num_layers": 48, "vocab_size": 50257}
+{
+    "bias": true,
+    "include_input": true,
+    "d_model": 1600,
+    "num_layers": 48,
+    "vocab_size": 50257
+}