[libadwaita] flap: Remove dead assignment

[Alexander Mikhaylenko <alexm src gnome org>]

commit 138150db1fcd8cfbde0270366382f7cdc55afd51
Author: ZenWalker <scow riseup net>
Date:   Tue Jun 1 20:28:45 2021 +0200

    flap: Remove dead assignment

 src/adw-flap.c | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/src/adw-flap.c b/src/adw-flap.c
index 0fefe6d1..c5362ada 100644
--- a/src/adw-flap.c
+++ b/src/adw-flap.c
@@ -650,7 +650,6 @@ compute_sizes (AdwFlap  *self,
 
   if (extra > 0 && flap_expand) {
     *flap_size += extra;
-    extra = 0;
 
     if (!revealed)
       *content_size = total;