Remove unused code
onModelLayoutChanged was removed in 2ceeb53b.
See !240 (merged)
Currently the code generates the error
file:///usr/share/ksysguard/sensorfaces/org.kde.ksysguard.processtable/contents/ui/ProcessTableView.qml:67: TypeError: Property 'onModelLayoutChanged' of object ProcessTableView_QMLTYPE_403(0x56449ce8c170) is not a function