Remove unused steam client libraries on Linux
* game\bin\libtier0_s.so and game\bin\libvstdlib_s.so specifically. They are not used since we use SteamCMD's automatic download of steamclient.so now
Delete linux_server_cycle.sh
* Unused file?
Remove height2normal.exe & height2ssbumb.exe
* Idk if they are useful for anyone. If need be, we can set them up to be compiled by the build system, since they aren't right now.