[pitivi] build: Use latest libpeas

[Alexandru Băluț <alexbalut src gnome org>]

commit b175f7a75f38c76bb70d4db6cfa5ce57bd098610
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Fri Oct 25 07:25:59 2019 +0200

    build: Use latest libpeas

 build/flatpak/org.pitivi.Pitivi.json               |   4 -
 .../patches/bugzilla-bug-660014-patch-355096.patch | 564 ---------------------
 pitivi/pluginmanager.py                            |   9 +-
 3 files changed, 4 insertions(+), 573 deletions(-)
---
diff --git a/build/flatpak/org.pitivi.Pitivi.json b/build/flatpak/org.pitivi.Pitivi.json
index 82bfdb2c..4b31c0bb 100644
--- a/build/flatpak/org.pitivi.Pitivi.json
+++ b/build/flatpak/org.pitivi.Pitivi.json
@@ -638,10 +638,6 @@
                 {
                     "type": "git",
                     "url": "https://git.gnome.org/browse/libpeas";
-                },
-                {
-                    "type": "patch",
-                    "path": "patches/bugzilla-bug-660014-patch-355096.patch"
                 }
             ]
         },
diff --git a/pitivi/pluginmanager.py b/pitivi/pluginmanager.py
index af5802bc..5ce558aa 100644
--- a/pitivi/pluginmanager.py
+++ b/pitivi/pluginmanager.py
@@ -145,11 +145,10 @@ class PluginManager(Loggable):
 
     def _setup_extension_set(self):
         plugin_iface = API(self.app)
-        self.extension_set =\
-            Peas.ExtensionSet.new_with_properties(self.engine,
-                                                  Peas.Activatable,
-                                                  ["object"],
-                                                  [plugin_iface])
+        self.extension_set = Peas.ExtensionSet.new(self.engine,
+                                                   Peas.Activatable,
+                                                   ["object"],
+                                                   [plugin_iface])
         self.extension_set.connect("extension-removed",
                                    self.__extension_removed_cb)
         self.extension_set.connect("extension-added",