[OpenJDK 2D-Dev] RFR: 8234769: Duplicate attribution in freetype.md

[Phil Race]

Bug: https://bugs.openjdk.java.net/browse/JDK-8234769
Webrev: http://cr.openjdk.java.net/~prr/8234769/

It looks like the update for the legal file we were given has 2 copies
of text about PSaux. I just need to remove one of them.

-phil.