[pitivi] Remove unused imports and fields

[Mathieu Duponchelle <mathieudu src gnome org>]

commit 30c06302f2ea22a2b895565726c8a478ac4dae16
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Mon Dec 2 18:42:27 2013 +0100

    Remove unused imports and fields

 pitivi/mainwindow.py        |    1 -
 pitivi/timeline/timeline.py |    6 +++---
 2 files changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/pitivi/mainwindow.py b/pitivi/mainwindow.py
index a9dd736..ae99f92 100644
--- a/pitivi/mainwindow.py
+++ b/pitivi/mainwindow.py
@@ -190,7 +190,6 @@ class PitiviMainWindow(Gtk.Window, Loggable):
         self._setActions(instance)
         self._createUi(instance, allow_full_screen)
         self.recent_manager = Gtk.RecentManager()
-        self._zoom_duration_changed = False
         self._missingUriOnLoading = False
 
         self.app.projectManager.connect("new-project-loading",
diff --git a/pitivi/timeline/timeline.py b/pitivi/timeline/timeline.py
index 0d971da..2554755 100644
--- a/pitivi/timeline/timeline.py
+++ b/pitivi/timeline/timeline.py
@@ -31,8 +31,8 @@ GtkClutter.init([])
 from gi.repository import Gst, GES, GObject, Clutter, Gtk, GLib, Gdk
 
 from pitivi.autoaligner import AlignmentProgressDialog, AutoAligner
-from pitivi.check import missing_soft_deps, at_least_version
-from pitivi.utils.timeline import Zoomable, Selection, SELECT, UNSELECT
+from pitivi.check import at_least_version
+from pitivi.utils.timeline import Zoomable, Selection, SELECT
 from pitivi.settings import GlobalSettings
 from pitivi.dialogs.prefs import PreferencesDialog
 from pitivi.utils.loggable import Loggable
@@ -41,7 +41,7 @@ from pitivi.utils.widgets import ZoomBox
 
 from ruler import ScaleRuler
 from gettext import gettext as _
-from pitivi.utils.pipeline import Pipeline, PipelineError
+from pitivi.utils.pipeline import PipelineError
 from elements import URISourceElement, TransitionElement, Ghostclip
 from controls import ControlContainer