pidgin/pidgin

Remove some dead meson code

2021-01-15, Gary Kramlich
c6789ca79811
Remove some dead meson code

Testing Done:
None, it's dead code.

Reviewed at https://reviews.imfreedom.org/r/433/
syntax: glob
.*.swp
.DS_Store
.flatpak-builder
*.pyc
*~
\#*\#
subprojects/*/
syntax: regexp
^build(.+)?\/
win32-install-dir(\.release)?