arch-packages: Update package list

Get rid of a lot of Python garbage. These were dependencies of hotdoc
which we do not really seem to use. This removes 350+ Mb of Python
packages.

arch-packages/pkglist.txt

@@ -110,7 +110,6 @@ gdb-dashboard
 gettext
 ghcup-hs-bin
 git
-glances
 glib2-devel
 gnu-netcat
 gnuplot
@@ -147,7 +146,6 @@ hdparm
 helix
 helvum
 hexyl
-hotdoc
 htop
 hunspell-en_gb
 hunspell-en_us
@@ -288,7 +286,6 @@ ppp
 pptpclient
 python
 python-lxml
-python-matplotlib
 python-pandocfilters
 python-pygments
 qpdf