Doc: Fix name of Multimedia Widgets module

Drop spurious 'Quick' added in 7638848d

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Change-Id: If11c55a2654ccea2ba674e0b8a4193f8d2b36610
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>

src/multimediawidgets/doc/src/qtmultimediawidgets-index.qdoc

@@ -50,7 +50,7 @@ QT += multimediawidgets
 
 \section1 Licenses and Attributions
 
-The Qt Quick Multimedia Widgets module is available under commercial licenses from \l{The Qt Company}.
+The Qt Multimedia Widgets module is available under commercial licenses from \l{The Qt Company}.
 In addition, it is available under free software licenses. Since Qt 5.4,
 these free software licenses are
 \l{GNU Lesser General Public License, version 3}, or