Removed debug operator autotests.

For QVideoFrame, QAudioFormat and QVideoSurfaceFormat. There's
no point in testing the formatting of the debug operator. These
tests can break every time there's a change in QDebug's output
policy.

Change-Id: I2349b4722a428bc4c56ca58b13889790e86df4c1
Reviewed-by: Christian Stromme <christian.stromme@digia.com>