Delete install scripts whose job is now done by package files

Each of these scripts only wrote a single /etc file (or copied
config/bashrc into the user home). The corresponding files now ship
from the omarchy-settings package — either directly into /etc (drop-ins
the package fully owns) or via the /usr/share/omarchy/etc-overrides
post_install dance (for upstream-owned paths).

Deleted:
- install/config/timezones.sh          -> etc/sudoers.d/omarchy-tzupdate
- install/config/sudoless-asdcontrol.sh -> etc/sudoers.d/omarchy-asdcontrol
                                          ($USER rewritten to %wheel)
- install/config/increase-sudo-tries.sh -> etc/sudoers.d/omarchy-passwd-tries
                                          (faillock.conf side now in etc-overrides)
- install/config/hardware/ignore-power-button.sh
                                        -> etc/systemd/logind.conf.d/10-ignore-power-button.conf
                                          (replaces sed-edit of logind.conf)
- install/config/hardware/usb-autosuspend.sh
                                        -> etc/modprobe.d/omarchy-usb-autosuspend.conf
- install/config/ssh-flakiness.sh       -> etc/sysctl.d/99-omarchy-sysctl.conf
- install/config/config.sh              -> /etc/skel seeds ~/.config from config/**;
                                          ~/.bashrc seeded from etc-overrides
- install/login/plymouth.sh             -> theme files already shipped by
                                          omarchy-settings; etc/plymouth/plymouthd.conf
                                          handled via etc-overrides

A separate migration tidies up the old paths on existing installs.
all.sh entries updated to drop these scripts.

install/config/all.sh

@@ -1,14 +1,10 @@
-run_logged $OMARCHY_INSTALL/config/config.sh
 run_logged $OMARCHY_INSTALL/config/theme.sh
 run_logged $OMARCHY_INSTALL/config/branding.sh
 run_logged $OMARCHY_INSTALL/config/git.sh
 run_logged $OMARCHY_INSTALL/config/gpg.sh
-run_logged $OMARCHY_INSTALL/config/timezones.sh
-run_logged $OMARCHY_INSTALL/config/increase-sudo-tries.sh
 run_logged $OMARCHY_INSTALL/config/increase-lockout-limit.sh
 run_logged $OMARCHY_INSTALL/config/lockscreen-pam.sh
 run_logged $OMARCHY_INSTALL/config/sleep-lock.sh
-run_logged $OMARCHY_INSTALL/config/ssh-flakiness.sh
 run_logged $OMARCHY_INSTALL/config/increase-file-watchers.sh
 run_logged $OMARCHY_INSTALL/config/increase-fd-limit.sh
 run_logged $OMARCHY_INSTALL/config/detect-keyboard-layout.sh
@@ -23,7 +19,6 @@ run_logged $OMARCHY_INSTALL/config/nautilus-python.sh
 run_logged $OMARCHY_INSTALL/config/localdb.sh
 run_logged $OMARCHY_INSTALL/config/fast-shutdown.sh
 run_logged $OMARCHY_INSTALL/config/unmount-fuse.sh
-run_logged $OMARCHY_INSTALL/config/sudoless-asdcontrol.sh
 run_logged $OMARCHY_INSTALL/config/input-group.sh
 run_logged $OMARCHY_INSTALL/config/omarchy-ai-skill.sh
 run_logged $OMARCHY_INSTALL/config/pi.sh
@@ -38,8 +33,6 @@ run_logged $OMARCHY_INSTALL/config/hardware/set-wireless-regdom.sh
 run_logged $OMARCHY_INSTALL/config/hardware/fix-fkeys.sh
 run_logged $OMARCHY_INSTALL/config/hardware/bluetooth.sh
 run_logged $OMARCHY_INSTALL/config/hardware/printer.sh
-run_logged $OMARCHY_INSTALL/config/hardware/usb-autosuspend.sh
-run_logged $OMARCHY_INSTALL/config/hardware/ignore-power-button.sh
 run_logged $OMARCHY_INSTALL/config/hardware/nvidia.sh
 run_logged $OMARCHY_INSTALL/config/hardware/vulkan.sh