Remove the finch plugin pietray

Review Request #874 — Created Aug. 4, 2021 and submitted — Latest diff uploaded

Information

pidgin/pidgin
default
a7aedf7d6174

Reviewers

It depends on the D-Bus API that we scrapped as well as GtkStatusIcon that's
been deprecated since Gtk 3.14.

did a clean build and install and verified there were no issues.