remove useless post_upgrade message

PKGBUILD

@@ -5,8 +5,8 @@
 # Contributor: korjjj <korjjj+aur@gmail.com>
 
 pkgname=syncthing
-pkgver=0.10.11
-pkgrel=2
+pkgver=0.10.12
+pkgrel=1
 pkgdesc="Open Source Continuous Replication / Cluster Synchronization Thing"
 url="http://syncthing.net/"
 license=('GPL3')

syncthing.install

@@ -7,7 +7,3 @@ cat << EOF
     systemctl enable syncthing@user
 EOF
 }
-
-post_upgrade() {
-    post_install
-}