test: remove Comæ test which is broken

The Unicode equivalence for the A & E ligatures is broken. Probably
because it exists two unicode representation of the same sign.  That
make the test existing test always failing.  I am removing it and filled
bug 46531 to fix the root cause.

Change-Id: I956d90919a07febc518ea387df5bca3b2a5d0583