Migrate to py3 style type annotation: sphinx.environment.adapters.asset

1 files changed, 3 insertions, 7 deletions

diff --git a/sphinx/environment/adapters/asset.py b/sphinx/environment/adapters/asset.py
index b57943967..bc282de0c 100644
--- a/sphinx/environment/adapters/asset.py
+++ b/sphinx/environment/adapters/asset.py
@@ -8,18 +8,14 @@
     :license: BSD, see LICENSE for details.
 """
 
-if False:
-    # For type annotation
-    from sphinx.environment import BuildEnvironment  # NOQA
+from sphinx.environment import BuildEnvironment
 
 
 class ImageAdapter:
-    def __init__(self, env):
-        # type: (BuildEnvironment) -> None
+    def __init__(self, env: BuildEnvironment) -> None:
         self.env = env
 
-    def get_original_image_uri(self, name):
-        # type: (str) -> str
+    def get_original_image_uri(self, name: str) -> str:
         """Get the original image URI."""
         while name in self.env.original_image_uri:
             name = self.env.original_image_uri[name]