Remove unused type:ignore annotation

sphinx/parsers.py

@@ -72,7 +72,7 @@ def parse_inline(self, inputstring: str, document: nodes.document) -> None:
         if has_literal:
             inputstring = inputstring[:-2]
 
-        self.setup_parse(inputstring, document)  # type: ignore[arg-type]
+        self.setup_parse(inputstring, document)
         self.statemachine = states.RSTStateMachine(
             state_classes=self.state_classes,
             initial_state='Text',