Doc: Removed documentation about the non-existent QKeyEvent::standardKey() function.
Doc: Removed documentation about the non-existent
QKeyEvent::standardKey() function.

Task-number: 254074
Reviewed-by: Trust Me
(cherry picked from commit 152d5fb2d97432d92b6b84e6e81c0236d278ac5d)

igor-sfdc/qt-wk,RLovelett/qt,KDE/qt,KDE/qt,radekp/qt,igor-sfdc/qt-wk,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,radekp/qt,RLovelett/qt,KDE/qt,RLovelett/qt,radekp/qt,RLovelett/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,radekp/qt,pruiz/wkhtmltopdf-qt,RLovelett/qt,RLovelett/qt,igor-sfdc/qt-wk,radekp/qt,KDE/qt,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,pruiz/wkhtmltopdf-qt,RLovelett/qt,radekp/qt,radekp/qt,radekp/qt,igor-sfdc/qt-wk,igor-sfdc/qt-wk,igor-sfdc/qt-wk,KDE/qt,pruiz/wkhtmltopdf-qt,igor-sfdc/qt-wk,RLovelett/qt,KDE/qt,igor-sfdc/qt-wk,KDE/qt,pruiz/wkhtmltopdf-qt,RLovelett/qt,radekp/qt,pruiz/wkhtmltopdf-qt,KDE/qt,radekp/qt,RLovelett/qt,pruiz/wkhtmltopdf-qt