fix config

config_sentence_transformers.json

@@ -3,8 +3,5 @@
     "sentence_transformers": "3.0.1",
     "transformers": "4.38.2",
     "pytorch": "2.2.1+cu121"
-  },
-  "prompts": {},
-  "default_prompt_name": null,
-  "similarity_fn_name": "cos_sim"
-}
+  }
+}