title: Remove all gradients from SVG
body: <p>I have a SVG file with a few objects it. They all have a linear gradient applied to them on top of their fill colour. I would like to clear all these gradients so that they are all one solid colour.
  I have found online many methods to "clean" a svg i.e. remove all unused gradients, but here I would like to remove all gradients whether they are used or not. </p>
  
  <p>Is there a method? (I have looked into inkscape and into the XML without finding anything obvious)</p>