[pitivi] project_: Remove dead condition

[Thibault Saunier <tsaunier src gnome org>]

commit 5970cca6b471d3d3e8ae19412b11aba8cffa691b
Author: Thibault Saunier <tsaunier gnome org>
Date:   Sun Aug 13 23:55:09 2017 -0300

    project_: Remove dead condition
    
    Reviewed-by: Alex Băluț <<alexandru balut gmail com>>
    Differential Revision: https://phabricator.freedesktop.org/D1835

 pitivi/project.py |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)
---
diff --git a/pitivi/project.py b/pitivi/project.py
index 39852f6..c376070 100644
--- a/pitivi/project.py
+++ b/pitivi/project.py
@@ -1346,10 +1346,6 @@ class Project(Loggable, GES.Project):
                 self.remove_asset(asset)
                 proxy_target.force_proxying = False
                 if delete_proxy_file:
-                    if not self.app.proxy_manager.is_proxy_asset(asset):
-                        raise RuntimeError("Trying to remove proxy %s"
-                                           " but it does not look like one!",
-                                           asset.props.id)
                     os.remove(Gst.uri_get_location(asset.props.id))
             else:
                 # The asset is an original which is not being proxied.