ci: gentoo: cleanup old Python commentary/entries

This dates back to before we changed to Python 3.12 default in Gentoo. I
don't remember why we specifically wanted/needed 3.12 in the CI builder
though (maybe something to do with distutils removal to test that). The
Python changes here shouldn't make much difference to binpkg eligibility
right now because the binhost has a double builder for old targets, though
it won't cover everything.

Signed-off-by: Sam James <sam@gentoo.org>

ci/ciimage/gentoo/install.sh

@@ -70,7 +70,6 @@ pkgs_stable=(
   #x11-libs/gtk+:3
 )
 pkgs_latest=(
-  # ~arch boost needed for py3.12 for now (needs 1.84)
   dev-build/b2
   dev-libs/boost
 
@@ -134,17 +133,20 @@ cat <<-EOF >> /etc/portage/make.conf
 	FEATURES="\${FEATURES} -ipc-sandbox -network-sandbox -pid-sandbox"
 EOF
 
-# TODO: Enable all Pythons / add multiple jobs with diff. Python impls?
+# Maybe we could enable all Pythons / add multiple jobs with diff. Python impls?
 #echo '*/* PYTHON_TARGETS: python3_10 python3_11 python3_12' >> /etc/portage/package.use/python
-echo '*/* PYTHON_TARGETS: python3_12' >> /etc/portage/package.use/python
-cat <<-EOF >> /etc/portage/profile/use.mask
--python_targets_python3_12
--python_single_target_python3_12
-EOF
-cat <<-EOF >> /etc/portage/profile/use.stable.mask
--python_targets_python3_12
--python_single_target_python3_12
-EOF
+
+# The below is for cases where we want non-default Python (either to get
+# better coverage from something older, or something newer)
+#echo '*/* PYTHON_TARGETS: python3_12' >> /etc/portage/package.use/python
+#cat <<-EOF >> /etc/portage/profile/use.mask
+#-python_targets_python3_12
+#-python_single_target_python3_12
+#EOF
+#cat <<-EOF >> /etc/portage/profile/use.stable.mask
+#-python_targets_python3_12
+#-python_single_target_python3_12
+#EOF
 
 echo 'dev-lang/python ensurepip' >> /etc/portage/package.use/python