Shapes editor: shape-inside / -webkit-shape-inside

[oslego]

Originally reported by @zhorvath in adobe/brackets#7962

Hi there,
I'm getting the following console error when trying to use shapes editor:

ConsoleAgent: shape-inside is not supported by this browser.
 Perhaps it is not enabled. See html.adobe.com/webplatform/enable in :21 /LiveDevelopment/Agents/ConsoleAgent.js:55
ConsoleAgent: -webkit-shape-inside is not supported by this browser.
 Perhaps it is not enabled. See html.adobe.com/webplatform/enable in :21 

We removed shape-inside support from WebKit&Blink in March (https://lists.webkit.org/pipermail/webkit-dev/2014-March/026391.html), since it's at Shapes Level 2. I recommend to remove the warning for shape-inside, since the release browsers won't have support for it in the foreseeable future.