Remove old 5.1-* bits

[Makoto Matsushita]

kuriyama> drwxrwxr-x  15 scottl  archive  1024 Jun  1 06:34 alpha/5.1-RC1
kuriyama> drwxr-xr-x  19 scottl  archive  1024 May 31 21:47 i386/5.1-RC1
kuriyama> drwxrwxr-x  13 marcel  archive  1024 Jun  3 19:44 ia64/5.1-RC1
kuriyama> drwxr-xr-x  19 scottl  archive  1024 May  9 17:37 pc98/5.1-BETA
kuriyama> drwxr-xr-x  13 scottl  archive  1024 May 20 12:04 sparc64/5.1-BETA2

And, how about 4.6.2-RELEASE for i386/alpha?  We have removed all
packages for 4.6.2 already.

-- -
Makoto `MAR' Matsushita