Remove marker property

Author: mwcraig

src/astro_image_display_api/dummy_viewer.py

@@ -36,7 +36,6 @@ class ImageViewer:
     image_height: int = 0
     zoom_level: float = 1
     _cursor: str = ImageViewerInterface.ALLOWED_CURSOR_LOCATIONS[0]
-    marker: Any = "marker"
     _cuts: BaseInterval | tuple[float, float] = AsymmetricPercentileInterval(upper_percentile=95)
     _stretch: BaseStretch = LinearStretch
     # viewer: Any

src/astro_image_display_api/interface_definition.py

@@ -28,7 +28,6 @@ class ImageViewerInterface(Protocol):
     image_height: int
     zoom_level: float
     cursor: str
-    marker: Any
 
     # Allowed locations for cursor display
     ALLOWED_CURSOR_LOCATIONS: tuple = ALLOWED_CURSOR_LOCATIONS