Created attachment 285543 [details] [review]
Optimize svg icon using scour

Instead of fixing just one line, I removed unused defs opening Inkscape, then
optimized svg image by running scour on it. Detail is the same, but size is
greatly reduced.

Here is the scour output:

 File: gnome-robots.svg 
 Time taken: 0.13s
 Number of elements removed: 10
 Number of attributes removed: 62
 Number of unreferenced id attributes removed: 0
 Number of style properties fixed: 17
 Number of raster images embedded inline: 0
 Number of path segments reduced/removed: 37
 Number of bytes saved in path data: 1897
 Number of bytes saved in colors: 2
 Number of points removed from polygons: 0
 Number of bytes saved in comments: 0
 Number of bytes saved in id attributes: 0
 Number of bytes saved in lengths: 2
 Number of bytes saved in transformations: 115
 Original file size: 13225 bytes; new file size: 5710 bytes (43.17%)