Doc: Remove outdated videos

Task-number: QDS-10565
Change-Id: I91d8bf4f6fb8f0b5b756fa4a3bf94753ab16adfb
Reviewed-by: Mats Honkamaa <mats.honkamaa@qt.io>

doc/qtcreator/images/extraimages/qtdesignstudio-extraimages.qdocconf

@@ -2,7 +2,6 @@
     images/commercial.png \
     images/SsFWyUeAA_4.jpg \
     images/9ihYeC0YJ0M.jpg \
-    images/RfEYO-5Mw6s.jpg \
     images/yOUdg1o2KJM.jpg \
     images/DVWd_xMMgvg.jpg \
     images/Ed8WS03C-Vk.jpg \
@@ -11,7 +10,5 @@
     images/w1yhDl93YI0.jpg \
     images/pEETxSxYazg.jpg \
     images/V3Po15bNErw.jpg \
-    images/bMXeeQw6BYs.jpg \
-    images/u3kZJjlk3CY.jpg \
     images/9MqUCP6JLCQ.jpg \
     images/KDxnMQzgmIY.jpg

doc/qtdesignstudio/src/components/qtquick-preset-components.qdoc

@@ -73,19 +73,6 @@
     \note Using 3D components will affect the performance of your UI. Do not
     use 3D components if the same results can be achieved using 2D components.
 
-    \section2 Videos About 3D Components
-
-    The following video shows you how to add the components included in the
-    \uicontrol {Qt Quick 3D} module, such as 3D models, cameras, and lights,
-    to your scene:
-
-    \youtube u3kZJjlk3CY
-
-    The following video shows you how to use the custom shader utilities, 3D
-    effects, and materials:
-
-    \youtube bMXeeQw6BYs
-
     The following video shows you how to combine 2D and 3D components:
 
     \youtube w1yhDl93YI0

doc/qtdesignstudio/src/views/qtquick-designer.qdoc

@@ -25,10 +25,6 @@
     You can move the views anywhere on the screen and save them as
     \e workspaces, as instructed in \l {Managing Workspaces}.
 
-    To learn more about using the design views, see the following video:
-
-    \youtube RfEYO-5Mw6s
-
     \section1 Summary of Design Views
 
     In addition to the summary of design views, the table below includes an MCU