removed optimization flag.

Author: jchanvfx

NodeGraphQt/widgets/viewer.py

@@ -68,7 +68,6 @@ def __init__(self, parent=None, undo_stack=None):
         self.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
         self.setViewportUpdateMode(QtWidgets.QGraphicsView.BoundingRectViewportUpdate)
         self.setCacheMode(QtWidgets.QGraphicsView.CacheBackground)
-        self.setOptimizationFlag(QtWidgets.QGraphicsView.DontAdjustForAntialiasing)
 
         self.setAcceptDrops(True)
         self.resize(850, 800)