Remove stale test expectation for complex-text-missing-glyph-fallback

The virtual/antialiasedtext/fast/text/international/complex-text-
missing-glyph-fallback.html test is no longer failing on Win7 since
r176053. Remove stale failure expectation.

TBR=ojan@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/345193002

git-svn-id: svn://svn.chromium.org/blink/trunk@176628 bbb929c8-8fbe-4397-9dbb-9b2b20218538