Remove unused hasLocalMatrix.

This method is not called anywhere on Android or Chrome, and it
has a FIXME that it may not be correct.

A client can still getLocalMatrix().isIdentity() if they need this
information. (It has the same FIXME, and perhaps we should revisit
it. In the meantime, this convenience method is not needed.)

Review URL: https://codereview.chromium.org/882443007
1 file changed