[openpyxl] Fix stubs for openpyxl.descriptors.sequence.UniqueSequence.seq_types (#14725)

Author: JanEricNitschke

stubs/openpyxl/@tests/stubtest_allowlist.txt

@@ -187,7 +187,3 @@ openpyxl.worksheet.smart_tag.CellSmartTagPr.__init__
 openpyxl.worksheet.smart_tag.CellSmartTags.__init__
 openpyxl.worksheet.table.TableColumn.__init__
 openpyxl.worksheet.table.XMLColumnProps.__init__
-
-# FIXME: new stubtest errors from mypy v1.18.1 that need to be looked at more closely.
-# See https://github.com/python/typeshed/pull/14699
-openpyxl.descriptors.sequence.UniqueSequence.seq_types

stubs/openpyxl/openpyxl/descriptors/sequence.pyi

@@ -38,7 +38,7 @@ class Sequence(Descriptor[_ContainerT]):
 
 # `_T` is the type of the elements in the sequence.
 class UniqueSequence(Sequence[set[_T]]):
-    seq_types: tuple[type[list[_T]], type[tuple[_T, ...]], type[set[_T]]]
+    seq_types: tuple[type, ...]  # defaults to `list`, `tuple`, `set`
     container: type[set[_T]]
 
 # See `Sequence` for the meaning of `_ContainerT`.