Removed PyQWT.

Author: mahmoudhossam

docs/scenarios/scientific.rst

@@ -55,15 +55,6 @@ manuscript-quality figures.  The API in many ways reflects that of `MATLAB <http
 easing transition of MATLAB users to Python.  Many examples, along with the
 source code to re-create them, can be browsed at the `matplotlib gallery <http://matplotlib.sourceforge.net/gallery.html>`_.
 
-
-PyQwt
------
-
-`PyQwt <http://pyqwt.sourceforge.net/>`_ is a solid library for plotting
-numerical data.  It is built on top of the popular `PyQt <http://www.riverbankcomputing.co.uk/software/pyqt/intro>`_
-GUI framework. It typically has better performance than matplotlib, but the
-range of built-in chart/plot types is slightly smaller than matplotlib.
-
 Resources
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