diff --git a/piker/ui/_curve.py b/piker/ui/_curve.py
index c8f21f48..d0a7121d 100644
--- a/piker/ui/_curve.py
+++ b/piker/ui/_curve.py
@@ -381,7 +381,6 @@ class FastAppendCurve(pg.PlotCurveItem):
         self._mouseShape = None
         self._mouseBounds = None
         self._boundsCache = [None, None]
-        #del self.xData, self.yData, self.xDisp, self.yDisp, self.path
 
         # path reservation aware non-mem de-alloc cleaning
         if self.path: