archlinux: Update install script descriptions

.archlinux/install-scripts/001-preinstall

@@ -1,7 +1,6 @@
 #!/bin/sh
 #
-# This script assumes you already have an active internet connection
-# (preferably through Ethernet).
+# Make partitions
 #
 # https://wiki.archlinux.org/index.php/Installation_guide
 

.archlinux/install-scripts/002-install

@@ -1,10 +1,6 @@
 #!/bin/sh
 #
-# Install the base packages to the mounted partition (the newly
-# created filesystem).
-#
-# We also install grub and fish since grub is the boot loader
-# and fish is the preferred shell.
+# Install packages to new filesystem
 #
 # https://wiki.archlinux.org/index.php/Installation_guide
 

.archlinux/install-scripts/003-configure

@@ -1,7 +1,6 @@
 #!/bin/sh
 #
-# Once this script finishes, change the root password with passwd,
-# then unmount /mnt (with umount) and restart the system.
+# Core system configs
 #
 # https://wiki.archlinux.org/index.php/Installation_guide
 

.archlinux/install-scripts/004-postinstall

@@ -1,7 +1,6 @@
 #!/bin/sh
 #
-# Common post-install system configuration that doesn't involve any
-# external packages (besides fish)
+# Higher-level configs
 #
 # https://wiki.archlinux.org/index.php/General_recommendations