these properties are already defined exactly like this in the RecordM…

…eta baseclass (#3360)

src/awkward/contents/recordarray.py

@@ -250,13 +250,6 @@ def __init__(
         self._length = length
         self._init(parameters, backend)
 
-    @property
-    def fields(self) -> list[str]:
-        if self._fields is None:
-            return [str(i) for i in range(len(self._contents))]
-        else:
-            return self._fields
-
     form_cls: Final = RecordForm
 
     def copy(
@@ -298,10 +291,6 @@ def simplified(
     ):
         return cls(contents, fields, length, parameters=parameters, backend=backend)
 
-    @property
-    def is_tuple(self) -> bool:
-        return self._fields is None
-
     def to_tuple(self) -> Self:
         return RecordArray(
             self._contents, None, self._length, parameters=None, backend=self._backend