TST: don't build .exe installers on Appveyor anymore, only wheels.
TST: don't build .exe installers on Appveyor anymore, only wheels.

The .exe installers aren't needed on PyPi anymore - if anyone still
uses easy_install then it's time they learn to use pip.

rgommers/pywt,aaren/pywt,eriol/pywt,michelp/pywt,michelp/pywt,ThomasA/pywt,rgommers/pywt,grlee77/pywt,kwohlfahrt/pywt,ThomasA/pywt,PyWavelets/pywt,michelp/pywt,rgommers/pywt,ThomasA/pywt,PyWavelets/pywt,kwohlfahrt/pywt,grlee77/pywt,eriol/pywt,rgommers/pywt,eriol/pywt,aaren/pywt,aaren/pywt,kwohlfahrt/pywt