Remove IMGPROXY_SVG_FIX_UNSUPPORTED docs

Author: DarthSim

docs/configuration/options.mdx

@@ -265,7 +265,6 @@ Autoquality requires the image to be saved several times. Use it only when you p
 * [`IMGPROXY_AUTOQUALITY_JXL_NET`]: ((pro)) the path to the neural network for JPEG XL.
 
 ## SVG processing
-* [`IMGPROXY_SVG_FIX_UNSUPPORTED`]: when `true`, imgproxy will try to replace SVG features unsupported by librsvg to minimize SVG rendering error. This config only takes effect on SVG rasterization. Default: `false`
 * [`IMGPROXY_ALWAYS_RASTERIZE_SVG`]: when `true`, imgproxy will always rasterize SVG images unless SVG processing is not [skipped](#skip-processing). Default: `false`
 
 ## AVIF/WebP/JPEG XL support detection