fix: Remove duplicate json import causing runtime error

- Removed local 'import json' statement inside get_servers() function
- This was shadowing the module-level import and causing
  'cannot access local variable' error
- json is already imported at the top of the file (line 44)

bot/api.py

@@ -1326,10 +1326,6 @@ def get_servers():
     
     logger.debug(f"Returning {len(servers)} servers")
     
-    # Debug: Show exact JSON being sent
-    import json
-    response_data = {"servers": servers}
-    
     return {"servers": servers}
 
 @app.post("/servers")