qulogic/pidgin

Delete some now-unused networking bits

2020-12-21, Elliott Sales de Andrade
4be4ea8a8dca
Delete some now-unused networking bits

* Remove several unnecessary networking headers and types.
* Remove some unused Windows networking wrappers.

Testing Done:
Compile only

Reviewed at https://reviews.imfreedom.org/r/306/
libpurple/data/purple-url-handler.desktop.in
libpurple/protocols/null/nullprpl.c
pidgin/data/im.pidgin.Pidgin.desktop.in
sub/libpurple/data/purple-url-handler.desktop.in
sub/libpurple/protocols/null/nullprpl.c
sub/pidgin/data/im.pidgin.Pidgin.desktop.in