Remove internal functions.
Remove internal functions.

QFeedback*Interface::instance functions are marked
as "internal" in QtMobility source code. Building
with it was raising unknown symbol error for
QFeedBackThemeInterface::instance.

Reviewer: Marcelo Lira <6be3b93b2f09145ada72571578cc4097e4ba9a9e@openbossa.org>
Reviewer: Luciano Wolf <c353ae890f0e6de8473e43011f009ccd38a3c452@openbossa.org>

PySide/Mobility,PySide/Mobility,PySide/Mobility,PySide/Mobility,PySide/Mobility