Remove unused json import from logging examples

The logging examples import the json library  but don't use it. Should be removed

Author: dontirun

doc_source/python-logging.md

@@ -7,7 +7,6 @@ To output logs from your function code, you can use [the `print` method](https:/
 **Example lambda\_function\.py**  
 
 ```
-import json
 import os
 
 def lambda_handler(event, context):
@@ -154,7 +153,6 @@ Log groups aren't deleted automatically when you delete a function\. To avoid st
 For more detailed logs, use the [logging library](https://docs.python.org/3/library/logging.html)\. 
 
 ```
-import json
 import os
 import logging
 logger = logging.getLogger()
@@ -182,4 +180,4 @@ START RequestId: 1c8df7d3-xmpl-46da-9778-518e6eca8125 Version: $LATEST
 END RequestId: 1c8df7d3-xmpl-46da-9778-518e6eca8125
 REPORT RequestId: 1c8df7d3-xmpl-46da-9778-518e6eca8125  Duration: 2.75 ms   Billed Duration: 100 ms Memory Size: 128 MB Max Memory Used: 56 MB  Init Duration: 113.51 ms    
 XRAY TraceId: 1-5e34a66a-474xmpl7c2534a87870b4370   SegmentId: 073cxmpl3e442861 Sampled: true
-```
+```