[librsvg: 7/8] Remove unneeded &mut

[Federico Mena Quintero <federico src gnome org>]

commit 698148becde7fd12be5fb9b47d16b4d9cc18ab41
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Mar 10 20:59:17 2021 -0600

    Remove unneeded &mut

 src/filters/mod.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/filters/mod.rs b/src/filters/mod.rs
index 1235129b..321df341 100644
--- a/src/filters/mod.rs
+++ b/src/filters/mod.rs
@@ -260,7 +260,7 @@ pub fn render(
         let start = Instant::now();
 
         if let Err(err) = filter
-            .render(&c, &mut filter_ctx, acquired_nodes, draw_ctx)
+            .render(&c, &filter_ctx, acquired_nodes, draw_ctx)
             .and_then(|result| filter_ctx.store_result(result))
         {
             rsvg_log!("(filter primitive {} returned an error: {})", c, err);