[shotwell] flatpak: Remove dedicated commit from exiv2

[Jens Georg <jensgeorg src gnome org>]

commit 901d15c3cedc5b73f0a8f609253711841e956de3
Author: Jens Georg <mail jensge org>
Date:   Thu Mar 26 13:08:19 2020 +0100

    flatpak: Remove dedicated commit from exiv2

 flatpak/org.gnome.Shotwell.json | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/flatpak/org.gnome.Shotwell.json b/flatpak/org.gnome.Shotwell.json
index e3019155..8f080858 100644
--- a/flatpak/org.gnome.Shotwell.json
+++ b/flatpak/org.gnome.Shotwell.json
@@ -117,8 +117,7 @@
                 {
                     "type" : "git",
                     "url" : "https://github.com/Exiv2/exiv2/";,
-                    "branch" : "0.27-maintenance",
-                    "commit" : "5360d82c4a64df8d6af21aa212ebe270e13eceb3"
+                    "branch" : "0.27-maintenance"
                 }
             ]
         },