Fix lint

qutebrowser/browser/downloads.py

@@ -176,7 +176,6 @@ class DownloadItem(QObject):
             os.remove(self.filename)
         self.finished.emit()
 
-
     def set_filename(self, filename):
         """Set the filename to save the download to.
 

qutebrowser/models/downloadmodel.py

@@ -88,7 +88,7 @@ class DownloadModel(QAbstractListModel):
             data = QVariant()
         return data
 
-    def flags(self, index):
+    def flags(self, _index):
         """Override flags so items aren't selectable.
 
         The default would be Qt.ItemIsEnabled | Qt.ItemIsSelectable."""