Convert pyside6

closes #48

sohstationviewer.py

@@ -7,17 +7,6 @@ from PySide6 import QtWidgets
 from sohstationviewer.view.main_window import MainWindow
 
 
-# Enable Layer-backing for MacOs version >= 11
-# Only needed if using the pyside2 library with version>=5.15.
-# Layer-backing is always enabled in pyside6.
-os_name, version, *_ = platform.platform().split('-')
-# if os_name == 'macOS' and version >= '11':
-# mac OSX 11.6 appear to be 10.16 when read with python and still required this
-# environment variable
-if os_name == 'macOS':
-    os.environ['QT_MAC_WANTS_LAYER'] = '1'
-
-
 def main():
     app = QtWidgets.QApplication(sys.argv)
     wnd = MainWindow()