Just delete the lines - they will not be used again.
PS. you can post code by wrapping it in tripple backticks ``` so it gets formatted correctly
Here is how you read those “Invalid config” error log messages: KNX integrations not working anymore from 2021.6 upgrade on - #3 by farmio
Invalid config for [knx]: [tunneling] is an invalid option for [knx]
Means that
knx:
tunneling: # <- this is invalid. Remove it and everything it contains
...