Removing cross/{binutils,gcc}-mips-current

[Martin Husemann <martin%duskware.de@localhost>]

I totaly forgot about these pkgs - it is high time to remove them,
they do not provide any real value nowadays and their names are totaly
confusing:

	cross/binutils-mips-current
	cross/gcc-mips-current

Neither of them is tracking gcc or binutils -current, both are ancient
versions. There are better pkgs for some similar targets available
as

	cross/mipsel-none-elf-binutils
	cross/mipsel-none-elf-gcc

so I'd like to propos removing the "current" ones.

Background: I added both some years ago when then-current versions of
binutils and gcc supported the Playstation2 cpu again (but the NetBSD
in-tree gcc/binutils did not yet do that). I guess noone is using those
pkgs any more.

Do we need to wait for post next branch, or can we just kill them?

Martin