Since d410ad364ec0b8877797145c68a4d7c3c98ce1c0 in qtdeclarative,
qtscript is no longer required to build qtdeclarative.  Remove the
dependency.

Change-Id: Ia1af0121ed05735c8dbec545b8dda30d3d37aa99
Reviewed-on: http://codereview.qt.nokia.com/2405


Reviewed-by: Alan Alpert <alan.alpert@nokia.com>
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>