Update CHANGELOG.md (#10476)

Remove incorrect and duplicate entries

cc @mapbox/sdk-platform
cc @mapbox/maps-ios

GitOrigin-RevId: 7807111e368f7472bd63d5ae24cdf4a32cb78ea3

Author: pjleonard37

CHANGELOG.md

@@ -6,16 +6,11 @@ Mapbox welcomes participation and contributions from everyone.
 
 ## 11.19.0 - 24 February, 2026
 
-### Features ✨ and improvements 🏁
-* Add animation to experimental `Marker` with two animation triggers: `appear` and `disappear`. Each trigger accepts `MarkerAnimationEffect` including `wiggle` (pendulum rotation), `scale`, `fadeIn`, and `fadeOut`. Effects can be customized with parameters (e.g., `scale(from: 0.5, to: 1.5)`, `fade(from: 0.5, to: 1.0)`) and combined for rich animations. See `MarkersExample` for usage.
-
 ### Bug fixes 🐞
 * Fix map panning not working on ViewAnnotations
 
 ## 11.19.0-rc.1 - 12 February, 2026
 
-## 11.19.0-rc.1
-
 ### Features ✨ and improvements 🏁
 * Introduce new `LineLayer.lineElevationGroundScale` property to scale elevated lines with terrain exaggeration.
 * Promote elevated lines properties to stable: `LineLayer.lineZOffset` and `LineLayer.lineElevationReference`.