[librsvg] Remove obsolete comment

[Federico Mena Quintero <federico src gnome org>]

commit 7dbc651391793aa77e77e1c99a85ef4cd89cced0
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Apr 30 18:57:45 2020 -0500

    Remove obsolete comment
    
    It became obsolete when this function started being to use the f64
    bounds instead of an IRect.

 rsvg_internals/src/filters/image.rs | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/rsvg_internals/src/filters/image.rs b/rsvg_internals/src/filters/image.rs
index 586388de..f588d5ac 100644
--- a/rsvg_internals/src/filters/image.rs
+++ b/rsvg_internals/src/filters/image.rs
@@ -87,7 +87,6 @@ impl FeImage {
             .lookup_image(url)
             .map_err(|_| FilterError::InvalidInput)?;
 
-        // TODO: this goes through a f64->i32->f64 conversion.
         let rect = self.aspect.compute(
             &ViewBox(Rect::from_size(
                 f64::from(image.width()),