remove table aliases placeholder

prompts/prompt_openai_o1.json

@@ -1,6 +1,6 @@
 [
   {
     "role": "user",
-    "content": "Generate a SQL query for {db_type} that answers the question `{user_question}`.\n{instructions}\nThis query will run on a database whose schema is represented in this string:\n{table_metadata_string}\n{table_aliases}\n\nReturn only the SQL query, and nothing else."
+    "content": "Generate a SQL query for {db_type} that answers the question `{user_question}`.\n{instructions}\nThis query will run on a database whose schema is represented in this string:\n{table_metadata_string}\n\nReturn only the SQL query, and nothing else."
   }
 ]