Clean up a couple minor things

Author: mwcraig

src/astro_image_display_api/interface_definition.py

@@ -339,7 +339,7 @@ def get_catalog_style(self, catalog_label: str | None = None) -> dict:
         raise NotImplementedError
 
     @abstractmethod
-    def remove_catalog(self, catalog_label: str | list[str] | None = None) -> None:
+    def remove_catalog(self, catalog_label: str | None = None) -> None:
         """
         Remove markers from the image.
 
@@ -356,6 +356,10 @@ def remove_catalog(self, catalog_label: str | list[str] | None = None) -> None:
             If the `catalog_label` is not provided when there are multiple
             catalogs loaded, or if the `catalog_label` does not correspond to a
             loaded catalog.
+
+        TypeError
+            If the `catalog_label` is not a string or `None`, or if it is not
+            one of the allowed values.
         """
         raise NotImplementedError