Remove waylandcpp from install instructions

We don't need the cpp lib, only the official C lib

BUG: 463466

INSTALLATION.md

@@ -17,7 +17,7 @@ sudo apt dist-upgrade
 ### Kubuntu and KDE Neon
 
 ```
-sudo apt install cmake extra-cmake-modules qtdeclarative5-dev libqt5x11extras5-dev libkf5iconthemes-dev libkf5plasma-dev libkf5windowsystem-dev libkf5declarative-dev libkf5xmlgui-dev libkf5activities-dev build-essential libxcb-util-dev libkf5wayland-dev git gettext libkf5archive-dev libkf5notifications-dev libxcb-util0-dev libsm-dev libkf5crash-dev libkf5newstuff-dev libxcb-shape0-dev libxcb-randr0-dev libx11-dev libx11-xcb-dev kirigami2-dev libwayland-dev libwayland-client++0 plasma-wayland-protocols libqt5waylandclient5-dev qtwayland5-dev-tools
+sudo apt install cmake extra-cmake-modules qtdeclarative5-dev libqt5x11extras5-dev libkf5iconthemes-dev libkf5plasma-dev libkf5windowsystem-dev libkf5declarative-dev libkf5xmlgui-dev libkf5activities-dev build-essential libxcb-util-dev libkf5wayland-dev git gettext libkf5archive-dev libkf5notifications-dev libxcb-util0-dev libsm-dev libkf5crash-dev libkf5newstuff-dev libxcb-shape0-dev libxcb-randr0-dev libx11-dev libx11-xcb-dev kirigami2-dev libwayland-dev libwayland-client0 plasma-wayland-protocols libqt5waylandclient5-dev qtwayland5-dev-tools
 ```
 
 ### Arch Linux