SVG icon cleanup

There should be no noticeable visual changes to the icon. Most of this is just the removal of unnecessary transforms, gradients, ids, groups, and css styles that weren't doing anything. I also got rid of the RDF section which I figured is fine because it wasn't really being used and isn't present in the Settings and Software icons either. Lastly I formatted it to use less lines and truncated decimal values down to their nearest thousandth. Truncating those values resulted in no noticeable change in the icon when zoomed in at 500% on a 4K monitor.

All these changes combined reduced the file size by 81%.