Remove unused members and methods from QTestLogger.

Remove unused members and methods from QTestLogger.

QTestLogger was counting various test outputs, but was only using three
of the counters internally and the rest were not used at all.  This
commit removes the unused counters and all of the getter methods.

Change-Id: I447183dcaf3e6cc335bbf58656e25b1d32ba810a
Reviewed-on: http://codereview.qt.nokia.com/3437
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>