libroot: remove delete_driver_settings

It is not present in BeOS R5 and it just call unload_driver_settings.

Replace delete_driver_settings usages with unload_driver_settings.
Keep the symbol on x86 for binary compatibility.

Change-Id: I1382710e3a4cb5c65d1249ea0e5880891e6800e4
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3485
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>

Fixed duplicated include.

* Was incorrectly positioned, and therefore got duplicated during
merge without me noticing it.

launch_daemon: GCC4 build fix.

Include string.h for strcmp, fix not keyword var.

launch_daemon: Fixed empty on/if parsing.

* An extra empty message was mistakenly created.

launch_daemon: Outlined basic event mechanism.

launch_daemon: Added events parsing.

* Including tests, also for the environment parsing.

launch_daemon: Now supports getting the env from a script.

* Scripts from targets are evaluated once on first target launch,
scripts from jobs are evaluated on each start.
* The "desktop" target now sources SetupEnvironment as usual.

launch_daemon: Added support for setting env.

* We cannot "source" files through a shell yet, though.

launch_daemon: Conditions now know if they are constant.

* This allows to remove a job in the init phase already, if its
condition is not only constant, but also failing.
* Also removed the special Job::LaunchInSafeMode() method; this is now
done using the conditions (the config option no_safemode remains,
though).

launch_daemon: Added run directive.

* Allows to conditionally (or unconditionally) launch targets.
* Including tests for the settings parser.
* FirstBootPrompt is now launched when deemed necessary (as in
the Bootscript).

launch_daemon: Completed condition parser.

launch_daemon: Started working on condition parsing.

* Moved related test code from DriverSettingsMessageAdapterTest to the
SettingsParser class.
* Added SettingsParserTest class -- most tests already succeed, but not
all; support for the flattened "not" is not working yet.

launch_daemon: Moved settings parsing into its own file.

Fixed duplicated include.

* Was incorrectly positioned, and therefore got duplicated during
merge without me noticing it.

launch_daemon: GCC4 build fix.

Include string.h for strcmp, fix not keyword var.

launch_daemon: Fixed empty on/if parsing.

* An extra empty message was mistakenly created.

launch_daemon: Outlined basic event mechanism.

launch_daemon: Added events parsing.

* Including tests, also for the environment parsing.

launch_daemon: Now supports getting the env from a script.

* Scripts from targets are evaluated once on first target launch,
scripts from jobs are evaluated on each start.
* The "desktop" target now sources SetupEnvironment as usual.

launch_daemon: Added support for setting env.

* We cannot "source" files through a shell yet, though.

launch_daemon: Conditions now know if they are constant.

* This allows to remove a job in the init phase already, if its
condition is not only constant, but also failing.
* Also removed the special Job::LaunchInSafeMode() method; this is now
done using the conditions (the config option no_safemode remains,
though).

launch_daemon: Added run directive.

* Allows to conditionally (or unconditionally) launch targets.
* Including tests for the settings parser.
* FirstBootPrompt is now launched when deemed necessary (as in
the Bootscript).

launch_daemon: Completed condition parser.

launch_daemon: Started working on condition parsing.

* Moved related test code from DriverSettingsMessageAdapterTest to the
SettingsParser class.
* Added SettingsParserTest class -- most tests already succeed, but not
all; support for the flattened "not" is not working yet.

launch_daemon: Moved settings parsing into its own file.