Squish: Remove unused object

Forgotten to remove this in e03132f5.

Change-Id: I7699c657d0ff8300ac38d96a9430d8c1e372628f
Reviewed-by: Robert Loehning <robert.loehning@qt.io>

tests/system/objects.map

@@ -135,7 +135,6 @@
 :Qt Creator.Replace All_QToolButton	{name='replaceAllButton' text='Replace All' type='QToolButton' visible='1' window=':Qt Creator_Core::Internal::MainWindow'}
 :Qt Creator.Replace_QToolButton	{name='replaceButton' text='Replace' type='QToolButton' visible='1' window=':Qt Creator_Core::Internal::MainWindow'}
 :Qt Creator.Stop_QToolButton	{text='Stop' type='QToolButton' unnamed='1' visible='1' window=':Qt Creator_Core::Internal::MainWindow'}
-:Qt Creator.WelcomePage_QQuickWidget	{name='WelcomePage' type='QQuickWidget' visible='1' window=':Qt Creator_Core::Internal::MainWindow'}
 :Qt Creator.replaceEdit_Utils::FilterLineEdit	{name='replaceEdit' type='Utils::FancyLineEdit' visible='1' window=':Qt Creator_Core::Internal::MainWindow'}
 :Qt Creator.scrollArea_QScrollArea	{type='ProjectExplorer::PanelsWidget' visible='1' window=':Qt Creator_Core::Internal::MainWindow'}
 :Qt Creator.splitter_QSplitter	{name='splitter' type='QSplitter' visible='1' window=':Qt Creator_Core::Internal::MainWindow'}

tests/system/suite_WELP/tst_WELP03/test.py

@@ -58,7 +58,6 @@ def openExample(examplesLineEdit, input, exampleRegex, exampleName):
     return example
 
 def main():
-    welcomePage = ":Qt Creator.WelcomePage_QQuickWidget"
     # open Qt Creator
     startApplication("qtcreator" + SettingsPath)
     if not startedWithoutPluginError():