Fix flake8 linting issue.

Author: HaudinFlorence

ipyleaflet/geoportal.py

@@ -3,7 +3,7 @@
 #
 
 
-from traitlets import Unicode, Dict
+from traitlets import Unicode
 from .leaflet import TileLayer, Control
 
 
@@ -38,6 +38,7 @@ class GeoportalLayerSwitcher(Control):
     _view_name = Unicode('LeafletGeoportalLayerSwitcherView').tag(sync=True)
     _model_name = Unicode('LeafletGeoportalLayerSwitcherModel').tag(sync=True)
 
+
 class GeoportalSearchEngine(Control):
     """GeoportalSearchEngine class, with Control as parent class
 
@@ -47,4 +48,3 @@ class GeoportalSearchEngine(Control):
 
     _view_name = Unicode('LeafletGeoportalSearchEngineView').tag(sync=True)
     _model_name = Unicode('LeafletGeoportalSearchEngineModel').tag(sync=True)
-