qtwayland: Remove unneeded (mostly) xdg-shell related patches

This patch removes the following patches:

- 0016-xdg-shell-Add-xdg-shell-protocol-file-version-1.4.0.patch
- 0017-xdg-shell-Add-minimize-feature-to-QWindow-using-wayl.patch
- 0019-xdg-shell-upgrade-to-support-current-version-weston-.patch
- 0099_qtwayland_no_evdev.patch
- UNUSED_NEEDS_CHECK_YOCTO_0018-packaging-enable-xdg-shell-at-runtime.patch

Bug-AGL: SPEC-3797

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Change-Id: Ida16800b4209166725d4aeae5e446214f5d46f1e