Remove antiquated \since lines in docs.

They aren't useful in the case of QtMultimedia{Kit}

Change-Id: If1b0b6625763c85907fb05beb9c440046472ddef
Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com>

src/multimedia/video/qabstractvideobuffer.cpp

@@ -64,7 +64,6 @@ namespace
 /*!
     \class QAbstractVideoBuffer
     \brief The QAbstractVideoBuffer class is an abstraction for video data.
-    \since 1.0
     \inmodule QtMultimedia
 
     The QVideoFrame class makes use of a QAbstractVideoBuffer internally to reference a buffer of
@@ -150,7 +149,6 @@ QAbstractVideoBuffer::~QAbstractVideoBuffer()
 /*!
     Returns the type of a video buffer's handle.
 
-    \since 1.0
     \sa handle()
 */
 QAbstractVideoBuffer::HandleType QAbstractVideoBuffer::handleType() const
@@ -163,7 +161,6 @@ QAbstractVideoBuffer::HandleType QAbstractVideoBuffer::handleType() const
 
     Returns the mode a video buffer is mapped in.
 
-    \since 1.0
     \sa map()
 */
 
@@ -192,7 +189,6 @@ QAbstractVideoBuffer::HandleType QAbstractVideoBuffer::handleType() const
     \note Writing to memory that is mapped as read-only is undefined, and may result in changes
     to shared data or crashes.
 
-    \since 1.0
     \sa unmap(), mapMode()
 */
 
@@ -204,7 +200,6 @@ QAbstractVideoBuffer::HandleType QAbstractVideoBuffer::handleType() const
     If the \l {QAbstractVideoBuffer::MapMode}{MapMode} included the \c QAbstractVideoBuffer::WriteOnly
     flag this will write the current content of the mapped memory back to the video frame.
 
-    \since 1.0
     \sa map()
 */
 
@@ -213,7 +208,6 @@ QAbstractVideoBuffer::HandleType QAbstractVideoBuffer::handleType() const
 
     The type of the handle is given by handleType() function.
 
-    \since 1.0
     \sa handleType()
 */
 QVariant QAbstractVideoBuffer::handle() const