remove blocks ignore mypyr

Author: andrewgsavage

pandas/core/internals/blocks.py

@@ -1644,11 +1644,7 @@ def round(self, decimals: int, using_cow: bool = False) -> Self:
         if not self.is_numeric or self.is_bool:
             return self.copy(deep=not using_cow)
         refs = None
-        # TODO: round only defined on BaseMaskedArray
-        # Series also does this, so would need to fix both places
-        # error: Item "ExtensionArray" of "Union[ndarray[Any, Any], ExtensionArray]"
-        # has no attribute "round"
-        values = self.values.round(decimals)  # type: ignore[union-attr]
+        values = self.values.round(decimals)
         if values is self.values:
             refs = self.refs
             if not using_cow: