Remove flawed test

- It is not possible to access properties on classes, only on instances, therefore this test is not something we can implement

libs/langchain/tests/unit_tests/output_parsers/test_base_output_parser.py

@@ -1,55 +0,0 @@
-"""Test the BaseOutputParser class and its sub-classes."""
-from abc import ABC
-from collections import defaultdict
-from typing import List, Optional, Set, Type
-
-import pytest
-
-from langchain.schema import BaseOutputParser
-
-
-def non_abstract_subclasses(
-    cls: Type[ABC], to_skip: Optional[Set] = None
-) -> List[Type]:
-    """Recursively find all non-abstract subclasses of a class."""
-    _to_skip = to_skip or set()
-    subclasses = []
-    for subclass in cls.__subclasses__():
-        if not getattr(subclass, "__abstractmethods__", None):
-            if subclass.__name__ not in _to_skip:
-                subclasses.append(subclass)
-        subclasses.extend(non_abstract_subclasses(subclass, to_skip=_to_skip))
-    return subclasses
-
-
-# parsers defined not in the output_parsers module:
-_PARSERS_TO_SKIP = {
-    "FakeOutputParser",
-    "BaseOutputParser",
-    "FinishedOutputParser",
-    "RouterOutputParser",
-    "TrajectoryRunEvalOutputParser",
-}
-_NON_ABSTRACT_PARSERS = non_abstract_subclasses(
-    BaseOutputParser, to_skip=_PARSERS_TO_SKIP
-)
-
-
-@pytest.mark.parametrize("cls", _NON_ABSTRACT_PARSERS)
-def test_subclass_implements_type(cls: Type[BaseOutputParser]) -> None:
-    try:
-        cls._type
-    except NotImplementedError:
-        pytest.fail(f"_type property is not implemented in class {cls.__name__}")
-
-
-def test_all_subclasses_implement_unique_type() -> None:
-    types = defaultdict(list)
-    for cls in _NON_ABSTRACT_PARSERS:
-        try:
-            types[cls._type].append(cls.__name__)
-        except NotImplementedError:
-            # This is handled in the previous test
-            pass
-    dups = {t: names for t, names in types.items() if len(names) > 1}
-    assert not dups, f"Duplicate types: {dups}"