silence mypy in a different way

Author: kmike

tox.ini

@@ -19,7 +19,10 @@ deps =
     mypy==0.941
     types-requests
 
-commands = mypy --ignore-missing-imports web_poet tests
+commands = mypy \
+    --ignore-missing-imports \
+    --no-warn-no-return \
+   web_poet tests
 
 [docs]
 changedir = docs

web_poet/page_inputs.py

@@ -189,4 +189,3 @@ def _auto_detect_fun(self, body: bytes) -> Optional[str]:
             except UnicodeError:
                 continue
             return resolve_encoding(enc)
-        return None