sagemathgh-40701: remove deprecated trace of surface dynamics, now an independent package
    
cf sagemath#20695

People should now go to https://flatsurf.github.io/surface-dynamics/

### 📝 Checklist

- [x] The title is concise and informative.
- [x] The description explains in detail what this PR is about.
- [x] I have linked a relevant issue or discussion.
    
URL: sagemath#40701
Reported by: Frédéric Chapoton
Reviewer(s): David Coudert

Author: Release Manager

src/sage/dynamics/meson.build

@@ -3,7 +3,6 @@ py.install_sources(
   'all.py',
   'finite_dynamical_system.py',
   'finite_dynamical_system_catalog.py',
-  'surface_dynamics_deprecation.py',
   subdir: 'sage/dynamics',
 )