Remove deprecated choropleth method (#1684)

Author: Conengmo

folium/folium.py

@@ -4,7 +4,6 @@
 """
 
 import time
-import warnings
 import webbrowser
 
 from branca.element import Element, Figure, MacroElement
@@ -457,21 +456,6 @@ def fit_bounds(
             )
         )
 
-    def choropleth(self, *args, **kwargs):
-        """Call the Choropleth class with the same arguments.
-
-        This method may be deleted after a year from now (Nov 2018).
-        """
-        warnings.warn(
-            "The choropleth  method has been deprecated. Instead use the new "
-            "Choropleth class, which has the same arguments. See the example "
-            "notebook 'GeoJSON_and_choropleth' for how to do this.",
-            FutureWarning,
-        )
-        from folium.features import Choropleth
-
-        self.add_child(Choropleth(*args, **kwargs))
-
     def keep_in_front(self, *args):
         """Pass one or multiple layers that must stay in front.
 

tests/test_folium.py

@@ -385,17 +385,6 @@ def test_choropleth_geopandas_str(self):
         assert '"fillColor":"a_random_color","fillOpacity":0.123454321' not in out_str
         assert '"fillOpacity":0.543212345' in out_str
 
-    def test_choropleth_warning(self):
-        """Test that the Map.choropleth method works and raises a warning."""
-        self.setup()
-        with open(os.path.join(rootpath, "us-counties.json")) as f:
-            geo_data = json.load(f)
-        with pytest.warns(FutureWarning):
-            self.m.choropleth(geo_data)
-        assert any(
-            [isinstance(child, Choropleth) for child in self.m._children.values()]
-        )
-
     def test_tile_attr_unicode(self):
         """Test tile attribution unicode"""
         m = folium.Map(location=[45.5236, -122.6750], tiles="test", attr="юникод")