Hello Suki,
Jon is right - please log an Idea and cross-link to this thread so that we may vote on it.
Our SE team have advised that they are open to the idea of raising/lowering the level of messages, such as changing a "SIGNIFICANT" message to a "TRACE" message. That way, it is still available if anyone needs it.
A more significant change would be to add an option to suppress/enable a log level.
HOWEVER, as a Workaround, if you are just interested in not seeing those messages, then just use a text editor that allows you to suppress those lines.
Notepad++ is good. I've written about it before.
Here's a link on how you can use it to suppress lines:
notepad++ - Regex: Remove lines containing - Stack Overflow
And I've given the example here of removing all "SIGNIFICANT" lines with this example:
Just replace it with your web session or whatever else you wish to exclude.
WARNING: Data will be lost if you then Save the file. Work in a Copy only to prevent against data loss.
Thanks, Kyle_R.