update readme

DDM-Corner-Helmholtz-2D/README.md

@@ -77,7 +77,6 @@ Here are the available options:
 - `Input`: 
   - `wavenumber`
   - `Type of incident wave`: `Plane wave` (exp^{i*k*(alpha*x)}, alpha = `Incident angle`) or Fourier mode (with m = `Mode number`)
-  - `Incident angle`: for a plane wave, this is the angle of incidence (in rad.).
 - `IterativeSolver`
   - `Solver`: `Jacobi` ("Parallel Schwarz") or `gmres`. The `print` is only for debugging purpose and might not work on your configuration.
   - `Tolerance`, `Max it` and `Restart` (GMRES only) are classical parameter