What happens if you press `Ctrl`+`.` at that line? That's the keyboard shortcut for Quick Actions (the light bulb feature). I'm not at my home machine at the moment so I can't test things.
– MC10Jul 29 '15 at 20:10
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I've played around with it a bit and it doesn't seem like there's any setting or option to turn it off. Quick Actions is a new feature in VS2015. Perhaps you can send Microsoft feedback or a frown and let them know that people don't want this.
– MC10Jul 30 '15 at 14:09
1 Answers1
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I've created an extension that hides the suggestion margin, but it also hides the outline margin, which might be undesirable for you. The source code is only a few lines as shown in the screenshot, simply removing the outlining line will do the trick.