foomatic-filters: remove recipe

foomatic-filters: remove recipe

Remove foomatic-filters recipe, as the project hasn't seen a release
since 2012 and is unmaintained.
Most of foomatic-filters code is part of cups-filters as foomatic-rip
(see [1] and [2]), which is in meta-oe since commit
a67aaaf00f4c818847f95c02340872a1a49a0f34.

[1] https://github.com/OpenPrinting/cups-filters/blob/release-1-26-2/NEWS#L2563
[2] https://lists.gt.net/gentoo/user/288187#288187

Signed-off-by: Diego Rondini <diego.rondini@kynetics.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>