Mozilla small-caps test

John Daggett can correct me if I'm wrong, but I believe the
small-caps test submitted by Mozilla
   http://test.csswg.org/source/contributors/mozilla/incoming/reftests/text-transform/
   http://mxr.mozilla.org/mozilla-central/source/layout/reftests/text-transform/
is invalid. It assumes that a small-caps lower-case "a" has
the same rendering as a capital "A" at 80% of the font size.

This assertion is both unsupported by the specification (nowhere
does it require 80% scaling) and, if I understand correctly,
a completely wrong test for fonts that have true small caps.

I'm removing this from Mozilla's submission. I'm surprised the
reftest has not caused noticeable failures.

~fantasai