Windows Phone: Remove ws2_32.lib dependency

We no longer require this library, so remove it from the linker list.

Change-Id: Ic211f8f6d954eddce8818807619962ad009be117
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@digia.com>
Windows Phone: Remove QT_NO_CURSOR

This define causes source incompatibilities in QML applications, as it
results in removal of properties from e.g. MouseArea. The default (null)
cursor implementation which will now be active should cause negligible
overhead with this define removed.

Change-Id: I8ee78e084cb95b4c73782a3a831f0672ba230b19
Reviewed-by: Jan Arve Sæther <jan-arve.saether@digia.com>