Update scale_draw.py

Author: PierreRaybaut

qwt/scale_draw.py

@@ -23,7 +23,6 @@
 from qwt.scale_map import QwtScaleMap
 from qwt.text import QwtText
 from qwt.math import qwtRadians
-from qwt.painter import QwtPainter
 
 from qwt.qt.QtGui import QPalette, QFontMetrics, QTransform
 from qwt.qt.QtCore import (Qt, qFuzzyCompare, QLocale, QRectF, QPointF, QRect,