test: remove test for ULONG_MAX queue allocation

test: remove test for ULONG_MAX queue allocation

Fixes the warning:
../libevdev/libevdev-int.h:231:15: warning: argument 1 value
‘18446744073709551615’ exceeds maximum object size 9223372036854775807
[-Walloc-size-larger-than=]

That's now part of gcc's -Wall, so let's rely on that for code. Arguably, the
queue code is simple enough that we don't need a test for ENOMEM anyway.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>