tools: drop event-debug

tools: drop event-debug

It's the same thing as libinput-debug-events and the newer "libinput
debug-events" command. The only reason it existed after we started providing
libinput-debug-events is the -no-install libtool flag that makes debugging
with gdb bearable.

Now that we're slowly moving to meson, this isn't needed anymore. If you want
to gdb directly in the source tree, build with meson.
Or use "libtool --mode=execute gdb" for an autotools build.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>