dev-haskell/binary: drop USE=test, bug #666810

dev-haskell/binary: drop USE=test, bug #666810

Test suite is not compatible with modern QuickCheck instances:

```
tests/Arbitrary.hs:17:10: error:
    Duplicate instance declarations:
      instance (Arbitrary a, Arbitrary b, Arbitrary c, Arbitrary d,
                Arbitrary e, Arbitrary f) =>
               Arbitrary (a, b, c, d, e, f)
        -- Defined at tests/Arbitrary.hs:17:10
        -- Defined in ‘Test.QuickCheck.Arbitrary’
```

Binary is not really an upgradeable package. Let's drop
test suite completely.

Reported-by: Pacho Ramos
Closes: https://bugs.gentoo.org/666810
Package-Manager: Portage-2.3.49, Repoman-2.3.11