Set git branch back to debian/master

debian/changelog

@@ -1,6 +1,5 @@
 ostree (2018.5+42+gecdebeb2-1) UNRELEASED; urgency=medium
 
-  * Switch to experimental branch
   * New upstream git snapshot with support for peer-to-peer software
     collections, required by Flatpak's peer-to-peer app sharing feature
     - d/copyright: Update

debian/control

@@ -48,7 +48,7 @@ Build-Depends-Indep:
 Rules-Requires-Root: no
 Standards-Version: 4.1.4
 Homepage: https://github.com/ostreedev/ostree/
-Vcs-Git: https://salsa.debian.org/debian/ostree.git -b debian/experimental
+Vcs-Git: https://salsa.debian.org/debian/ostree.git
 Vcs-Browser: https://salsa.debian.org/debian/ostree
 
 Package: gir1.2-ostree-1.0

debian/gbp.conf

@@ -1,7 +1,7 @@
 [DEFAULT]
 pristine-tar = True
 compression = xz
-debian-branch = debian/experimental
+debian-branch = debian/master
 upstream-branch = upstream/latest
 patch-numbers = False
 upstream-vcs-tag = v%(version)s