Remove duplicate import

Author: geographika

owslib/feature/__init__.py

@@ -10,7 +10,6 @@
 from urllib.parse import urlencode
 from owslib.crs import Crs
 from owslib.util import Authentication, build_get_url
-from owslib.util import Authentication
 from owslib.feature.schema import get_schema
 from owslib.feature.postrequest import PostRequest_1_1_0, PostRequest_2_0_0