[kde-base/kwayland] Remove kwayland-wayland-1.5.patch from 9999.

The latest KWayland no longer requires the kwayland-wayland-1.5.patch,
as the latest changes in git no longer require egl.

Upstream commit: 2180655167287d94f65af9ecea766aef94489158

Package-Manager: portage-2.2.8-r2