Remove unused method: append_data()

mrcnn/utils.py

@@ -340,17 +340,6 @@ class Dataset(object):
         assert info['source'] == source
         return info['id']
 
-    def append_data(self, class_info, image_info):
-        self.external_to_class_id = {}
-        for i, c in enumerate(self.class_info):
-            for ds, id in c["map"]:
-                self.external_to_class_id[ds + str(id)] = i
-
-        # Map external image IDs to internal ones.
-        self.external_to_image_id = {}
-        for i, info in enumerate(self.image_info):
-            self.external_to_image_id[info["ds"] + str(info["id"])] = i
-
     @property
     def image_ids(self):
         return self._image_ids