Red Error/Warning Bar in Splunk

If your view (page) is written using the Simplified XML then there are a couple tricks but they're complicated or hacky or both.

However if you're already using the Advanced XML it's quite easy -- navigate to Manager > User Interface > Views > <your view here>

you should see some module tags with class="Message".

<module class="Message">
    ...stuff...
</module>

The 2 at the top are generally the ones that are responsible for displaying errors. You can just carefully comment those out. I don't really recommend this because I find that when people do this, a week or two later they'll be tearing their hair out with something that's not working and it ends up being because they have no way of seeing the error message that would make them slap their forehead...

So.... if you want to be more fine grained about it, (and sadly the Message module doesn't have very useful filtering), but you can follow the technique that the 'discover' app uses. Download that app from splunkbase, look in /appserver/static/application.js for references to Splunk.Module.Message and read the comments there. If you copy that block of javascript into your app you'll be able to do some useful filtering on what actual messages it does and does not display.

If you're stuck with the simplified XML and/or dont want to muck with application.js you can apply some CSS from /application/static/application.css to just suppress the display of the message module entirely::

div.Message {
    display:none;
}

but for the same reason I mention above, I'd only do this if you really really need to. And you might need to put it back when you're debugging.