pidgin/pidgin

Remove more unused Windows wrapper parts

2021-02-13, Elliott Sales de Andrade
83ce555aeb47
Remove more unused Windows wrapper parts

Remove unused Windows gettimeofday wrapper defines.
Remove struct definitions for removed `ioctl` wrapper.

Testing Done:
Compile only.

Reviewed at https://reviews.imfreedom.org/r/506/
nullclient = executable('nullclient', 'nullclient.c', 'defines.h',
c_args : ['-DSTANDALONE'],
dependencies : [libpurple_dep, glib])