meta: Remove unused packages

Since I figured out how to run both KDE and GTK applications with
their proper settings under any lightweight window manager, and since
I now know how to configure these programs independent of their desktop
environments, this commit removes plasma-desktop, with the possibility
of gnome-shell bring removed in a future commit as well.

The rationale is that using a desktop environment is counter-intuitive
when you already use a window manager. Having multiple desktop environments
to start a session with is certainly amusing, but not at all practical,
especially when you can accomplish anything that needs to be done with
any window manager.

Switching between GNOME, Plasma, and bspwm also caused some inconsistent
X settings that I assume are non-trivial to fix without a proper restart
of the X server.

Simply starting the Plasma desktop environment will create quite a few
files in ~/.config. These files consist of window coordinates and other
non-friendly things, which, IMO, should not belong in the *user's* config
directory.

Regarding other software, GNOME MPV is arguably easier to use and less
buggy than baka-mplayer. Manipulating archives is also much easier with
file-roller than it is with ark. Since I got Audacity to look decent on a
HiDPI display, I no longer have a use for Kwave, which did not have some
of the essential features I used in Audacity anyway.

l3afpad functions much more like a notepad than kwrite, which is what
I'm looking for since I already use Vim. Using Cantata as a mpd client
is simply not the same as using ncmpcpp. zathura and evince are more
than enough for document viewing, hence the removal of Okular.

.archlinux/PKGBUILDs/tari-core/PKGBUILD

@@ -95,18 +95,10 @@ depends=(
   sxhkd
   dunst
   compton
-  plasma-desktop
-  plasma-pa
-  kscreen
   kleopatra
   obs-studio
-  baka-mplayer
   dolphin
-  ark
-  okular
   gwenview
-  cantata
-  kwrite
   kcolorchooser
   kolourpaint
   kmag
@@ -114,7 +106,6 @@ depends=(
   kdenlive
   krita
   texstudio
-  kwave
   kmplot
   kalzium
   kwordquiz
@@ -139,16 +130,12 @@ depends=(
   lollypop
   evolution
   ghex
-  liferea
   libreoffice-fresh
   poedit
   gnome-clocks
-  gnome-characters
   gnome-maps
-  gnome-system-monitor
   gnome-disk-utility
   gnome-screenshot
-  gnome-weather
   gnome-break-timer
   firefox
   chromium