So you might use Chrome and you might use it to access some local application/thing. If you are like me, this warning is super annoying, especially since it is always there going hey, this isn't secure. Hey... did you know this isn't secure? By the by, this is insecure.
To remove it, in Chrome's URL bar type: chrome://flags
Search for insecure. The two things you want to change are:
Add the URLs you don't want to see that warning on in the trusted source box. You can go on with your life living on the edge.